Git Hooks: Merge hook scripts and tests from blender-devops

git-hooks/README.md

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+# Git Hooks
+
+## Reject Merge Commits
+
+`blender_merged_hook` rejects merge commits to branches were we don't want them.
+It is installed as an `pre-receive` hook.
+
+## Deny Binary Files
+
+The `deny-binary` rejects binary files, that should have used LFS instead.
+It is installed as a `pre-receive` hook.
+
+To circumvent the rejection you can add `override restrictions` anywhere in the commit message.
+
+## Repositories
+
+Repositories with hooks:
+
+- `blender/blender`
+- `blender/blender-assets`
+- `blender/blender-benchmarks`
+- `blender/blender-developer-docs`
+- `blender/blender-manual`
+- `blender/lib-linux_x64`
+- `blender/lib-macos_arm64`
+- `blender/lib-macos_x64`
+- `blender/lib-source`
+- `blender/lib-windows_arm64`
+- `blender/lib-windows_x64`
+
+Archived repositories that may have hooks, but are not longer being updated:
+
+- `blender/blender-addons`
+- `blender/blender-addons-contrib`
+- `blender/blender-test-data`