Added workflow to close stale issues & PRs (#102)

* Added close_stale_issues_pr.yml

* Add stale label and exempt draft PRs

* Add new line to resolve linting error

Author: TheNova22

.github/workflows/close_stale_issues_pr.yml

@@ -0,0 +1,66 @@
+name: Close stale issues and PRs
+on:
+  workflow_call:
+    inputs:
+      days-before-stale:
+        description: "Days of inactivity before marking as stale"
+        type: number
+        required: false
+        default: 90
+      days-before-close:
+        description: "Days of inactivity before closing stale issues/PRs"
+        type: number
+        required: false
+        default: 30
+      exempt-issue-labels:
+        description: "Comma-separated list of labels that exempt issues from being marked as stale"
+        type: string
+        required: false
+        default: ""
+      exempt-pr-labels:
+        description: "Comma-separated list of labels that exempt PRs from being marked as stale"
+        type: string
+        required: false
+        default: ""
+      stale-issue-message:
+        description: "Message to post when marking an issue as stale"
+        type: string
+        required: false
+        default: "This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions."
+      stale-pr-message:
+        description: "Message to post when marking a PR as stale"
+        type: string
+        required: false
+        default: "This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions."
+      close-issue-message:
+        description: "Message to post when closing a stale issue"
+        type: string
+        required: false
+        default: "This issue has been automatically closed due to inactivity. Please feel free to reopen if you would like to continue working on this."
+      close-pr-message:
+        description: "Message to post when closing a stale PR"
+        type: string
+        required: false
+        default: "This pull request has been automatically closed due to inactivity. Please feel free to reopen if you would like to continue working on this."
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - name: Close stale issues and PRs
+        uses: actions/stale@v10.2.0
+        with:
+          days-before-stale: ${{ inputs.days-before-stale }}
+          days-before-close: ${{ inputs.days-before-close }}
+          exempt-issue-labels: ${{ inputs.exempt-issue-labels }}
+          exempt-pr-labels: ${{ inputs.exempt-pr-labels }}
+          stale-issue-message: ${{ inputs.stale-issue-message }}
+          stale-pr-message: ${{ inputs.stale-pr-message }}
+          close-issue-message: ${{ inputs.close-issue-message }}
+          close-pr-message: ${{ inputs.close-pr-message }}
+          stale-issue-label: "stale"
+          stale-pr-label: "stale"
+          exempt-draft-pr: true