Add "Edit this page", keep generated pages read-only

[PierreDillard]

• Enable in-browser edits via MkDocs Material .
• Hide edit button on Filters/, MP4Box/ and homepage .
• Keep a clear header link to gpac/gpac ; repo_url now points to gpac/wiki.

[Copilot]

Pull Request Overview

This PR adds an "Edit this page" feature to the GPAC wiki using MkDocs Material while keeping generated content read-only. It configures the wiki repository for editing, adds a dedicated link to the main GPAC source code in the header, and selectively hides the edit button on auto-generated pages.

Key changes:

• Configured MkDocs Material's edit functionality to point to gpac/wiki repository
• Added conditional logic to hide edit buttons on generated pages (Filters/, MP4Box/, homepage)
• Added a dedicated GPAC source code link in the header to maintain visibility of the main repository

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
mkdocs.yml	Configures edit functionality, updates repo URLs, and adds social links
overrides/base.html	Adds conditional edit button display logic
overrides/partials/header.html	Adds dedicated GPAC source code link in header

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[rbouqueau]

Wow, sounds great! Who would be the committer when such edits are made?

[PierreDillard]

Wow, sounds great! Who would be the committer when such edits are made?

The committer is always the authenticated user who edits and saves the file in the online editor.
This is managed entirely by the GitHub web interface. https://squidfunk.github.io/mkdocs-material/setup/adding-a-git-repository/ ,https://www.mkdocs.org/user-guide/configuration/#edit_uri

[nlsdvl]

Thanks a lot for setting this up @PierreDillard ! Not sure if the wiki repo icon is worth displaying, but it's really nice to be able to edit this content directly from the relevant pages.