Configuration for "read-only"/"do-not-edit" files and folders

[rkaramc]

#11586 has an idea to set a buffer to read-only.

Would be great if the configuration (config.toml) allows setting files/folders (even globs?) as read-only/no-edit.

I find myself inadvertently modifying files in .venv/ or node_modules/ when using gd et al.

So, can we provide a user or workspace config that would:
a) warn user when opening a file from one of these files/folders/globs
b) prevent user from :w writing the changes to disk
c) require user to :w! to write the changes by force

Thanks