Replace issue templates with issue form for better user assistance

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Bug Report
+description: Report a bug or crash
+labels: bug
+assignees: umireon
+body:
+  - type: markdown
+    id: md_welcome
+    attributes:
+      value: |
+        ## 🐞 Bug Report for Live Background Removal Lite
+
+        Please fill out **all required fields**. Incomplete reports may be closed without investigation.
+        - Attach an OBS log file (see below).
+        - For crashes, attach a crash log if available.
+        - Check existing issues before submitting a new one.
+
+        **Note:** Developers are human too—please be polite and respectful in your communication.
+        Also, please understand that development time and resources are limited.
+
+  - type: dropdown
+    id: os_info
+    attributes:
+      label: Operating System
+      description: Which operating system are you using?
+      options:
+        - Windows 11
+        - Windows 10
+        - macOS 26
+        - macOS 15
+        - macOS 14
+        - macOS 13
+        - macOS 12
+        - macOS 11
+        - Ubuntu 24.04
+        - Arch Linux
+        - Other (please specify below)
+    validations:
+      required: true
+
+  - type: input
+    id: os_info_other
+    attributes:
+      label: Other OS (if not listed above)
+      description: Specify your OS if you selected "Other".
+      placeholder: "e.g., Fedora 39, FreeBSD 13.2"
+    validations:
+      required: false
+
+  - type: input
+    id: plugin_version
+    attributes:
+      label: Plugin Version
+      description: What version of Live Background Removal Lite are you using?
+      placeholder: "e.g., 1.0.0, 1.0.0-beta1, git-abcdef"
+    validations:
+      required: true
+
+  - type: input
+    id: obs_version
+    attributes:
+      label: OBS Studio Version
+      description: Which version of OBS Studio are you using? (e.g., 32.0.2, 33.0.0-beta1, git-abcdef)
+      placeholder: "e.g., 32.0.2, 33.0.0-beta1, git-abcdef"
+    validations:
+      required: true
+
+  - type: input
+    id: obs_log_url
+    attributes:
+      label: OBS Studio Log URL
+      description: |
+        Please provide the obsproject.com URL to the OBS log file where this issue occurred.
+        **Bug reports without a log file will be closed.**
+        (Help menu > Log Files > Upload Current/Previous Log File)
+      placeholder: "https://obsproject.com/logs/xxxxxxx"
+    validations:
+      required: true
+
+  - type: input
+    id: obs_crash_log_url
+    attributes:
+      label: OBS Studio Crash Log URL (if applicable)
+      description: If this is a crash report, provide the obsproject.com URL to the crash log file.
+      placeholder: "https://obsproject.com/logs/xxxxxxx"
+    validations:
+      required: false
+
+  - type: textarea
+    id: expected_behavior
+    attributes:
+      label: Expected Behavior
+      description: What did you expect to happen?
+      placeholder: "Describe what should have happened."
+    validations:
+      required: true
+
+  - type: textarea
+    id: current_behavior
+    attributes:
+      label: Actual Behavior
+      description: What actually happened?
+      placeholder: "Describe what actually happened, including error messages if any."
+    validations:
+      required: true
+
+  - type: textarea
+    id: steps_to_reproduce
+    attributes:
+      label: Steps to Reproduce
+      description: How can we reproduce this bug? Please provide step-by-step instructions.
+      placeholder: |
+        1. ...
+        2. ...
+        3. ...
+    validations:
+      required: true
+
+  - type: textarea
+    id: additional_notes
+    attributes:
+      label: Additional Notes / Screenshots
+      description: Add any other context, screenshots, or information that might help us understand the issue.
+    validations:
+      required: false
+
+  - type: checkboxes
+    id: confirm_log
+    attributes:
+      label: Confirmation
+      description: Please confirm the following before submitting.
+      options:
+        - label: I have attached the required OBS log file(s).
+          required: true

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+
+contact_links:
+  - name: 💬 GitHub Discussions
+    url: https://github.com/kaito-tokyo/live-backgroundremoval-lite/discussions
+    about: Ask questions, get help, or start discussions with the community
+
+  - name: 🌐 Official Website
+    url: https://kaito-tokyo.github.io/live-backgroundremoval-lite/
+    about: Find installation guides, usage instructions, and official documentation

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: Feature Request
+description: Suggest an idea or improvement for this project
+labels: enhancement
+assignees: umireon
+body:
+  - type: markdown
+    id: md_welcome
+    attributes:
+      value: |
+        ## 💡 Feature Request for Live Background Removal Lite
+
+        Please fill out the form below to suggest a new feature or improvement.
+        - Check existing issues before submitting a new one.
+        - Provide as much detail as possible.
+
+        **Note:** Developers are human too—please be polite and respectful in your communication.
+        Also, please understand that development time and resources are limited.
+
+  - type: textarea
+    id: problem
+    attributes:
+      label: Is your feature request related to a problem?
+      description: Describe the problem you are experiencing. (If not, you can leave this blank.)
+      placeholder: "I'm always frustrated when ..."
+    validations:
+      required: false
+
+  - type: textarea
+    id: solution
+    attributes:
+      label: Describe the solution you'd like
+      description: What do you want to happen? Please be as specific as possible.
+      placeholder: "I would like to see ..."
+    validations:
+      required: true
+
+  - type: textarea
+    id: technical_basis
+    attributes:
+      label: Technical Justification / Feasibility
+      description: |
+        Please explain why you believe this feature is technically feasible, or provide ideas on how it could be implemented.
+        (For example: reference to APIs, libraries, similar plugins, or technical documentation.)
+      placeholder: "This should be possible because ... (e.g., OBS provides an API for ..., or similar functionality exists in ...)"
+    validations:
+      required: true
+
+  - type: textarea
+    id: additional_context
+    attributes:
+      label: Additional context
+      description: Add any other context, links, or screenshots about the feature request here.
+    validations:
+      required: false