Skip download/cleanup for local search paths

[Copilot]

Local directories passed via -d flag were being unnecessarily downloaded to temp directories and deleted afterward, even when they were already on the local filesystem.

Changes

• Path detection: Added isLocalPath() to identify local paths (file://, absolute, relative) vs remote protocols (git::, https://, s3::)
• Download logic: Modified downloadRemoteDirectories() to use local paths in-place without downloading
• Cleanup logic: Modified cleanupDownloadedDirectories() to skip deletion of local paths

Behavior

Before:

$ coding-context -d file:///path/to/rules test-task
# Downloads /path/to/rules to /tmp/..., uses it, then deletes it

After:

$ coding-context -d file:///path/to/rules test-task
# Uses /path/to/rules directly in-place

All three local path formats now skip download/cleanup:

• file:///absolute/path
• /absolute/path
• ./relative/path

Remote protocols continue to download and cleanup as before.

Original prompt

When a search path is a local folder, do not download it or delete it. Just use it in place.

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[Copilot]

Pull request overview

This PR optimizes the handling of local directories by preventing unnecessary download and cleanup operations. Instead of copying local directories to temporary locations and deleting them afterward, the tool now uses them directly in-place.

Key Changes

• Added path detection logic to distinguish between local paths (file://, absolute, relative) and remote protocols (git::, https://, s3::)
• Modified download and cleanup operations to skip local paths while maintaining existing behavior for remote resources
• Added comprehensive unit and integration tests for the new path handling logic

Reviewed changes

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

File	Description
pkg/codingcontext/context.go	Implements isLocalPath() and normalizeLocalPath() helper functions; updates downloadRemoteDirectories() and cleanupDownloadedDirectories() to handle local paths in-place
pkg/codingcontext/context_test.go	Adds table-driven unit tests for isLocalPath() and normalizeLocalPath() covering various path formats
integration_test.go	Adds end-to-end tests verifying local directories are not deleted after command execution for both file:// protocol and absolute path formats