Support white listing specific files/folders to allow auto-approved writes to.

[TristanSpeakEasy]

Similar to how auto-approved executions work with a whitelist of commands to match.

Would be good if you can do the same, so they you can for example allow auto-writes to a /memory-bank folder or specific files like README.md.

Would be good if the paths are relative to the workspace root by default or support absolute paths and wildcards/glob patterns as well