feat: add container file browser

[Deducer]

Changes

Add a file browser Livewire component that lets users browse, upload, download, and manage files inside running containers. Accessible from the Files tab on application, database, and service pages, gated behind canAccessTerminal permission.

• Browse container filesystem with directory navigation and breadcrumbs
• Upload files via Livewire temp upload, SCP to remote, docker cp into container
• Download files (base64) and folders (tar.gz), with 100MB size limit
• Create and delete folders/files with confirmation prompts
• Path validation blocks traversal, shell metacharacters, and null bytes
• Index-based wire:click references prevent XSS from special characters in filenames

Issues

• fixes: [Enhancement]: Filebrowser for Containerlevel #6519

Category

• New feature

Screenrecording

• https://www.loom.com/share/b36ded097a344aa59c4187e757e2b31c

AI Assistance

• AI was used to create this PR

Testing

• Deploy any application/database/service so a container is running
• Navigate to the resource page, click the "Files" tab (requires terminal access)
• Select a container from the dropdown (auto-selects if only one)
• Verify root directory listing shows permissions, owner, group, size, modified date
• Click a directory to navigate into it, use Up button and breadcrumbs to navigate back
• Click "New Folder", enter a name, click Create, verify it appears
• Upload a file, verify it appears in the current directory
• Download a file and a folder, verify correct content
• Delete an entry, confirm the prompt, verify removal

Contributor Agreement

Important

• I have read and understood the contributor guidelines. If I have failed to follow any guideline, I understand that this PR may be closed without review.
• I have searched existing issues and pull requests (including closed ones) to ensure this isn't a duplicate.
• I have tested all the changes thoroughly with a local development instance of Coolify and I am confident that they will work as expected when a maintainer tests them.

[Deducer]

Screen recording showing the file browser feature working on a PostgreSQL database and a service: https://www.loom.com/share/b36ded097a344aa59c4187e757e2b31c

[ShadowArcanist]

The feature looks great, I just updated the PR description to add the screen recording link.

Note: It might take a while for the core maintainers to check this PR so please avoid pinging anyone here