edit predictions: Initial Tree-sitter context gathering (#38372)

Release Notes:

- N/A

Co-authored-by: Agus <agus@zed.dev>
Co-authored-by: Oleksiy <oleksiy@zed.dev>
Co-authored-by: Finn <finn@zed.dev>
f562e7e157Michael Sloan committed on 9/18/2025, 12:44:40 PM· committed by GitHubparent202dcb1
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