feat: add hotkey commands for copy path actions

- Add "Copy Path: Copy vault path for current file" and "Copy Path: Copy full path for current file" commands
- Implement getTargetFileForCommand() with priority logic (editor > explorer > vault root)
- Commands respect existing settings (trailing slash for folders, etc.)
- Enhanced notices with source indicators for vault root fallback
- Use defensive programming for file explorer API access
- Bump version to 0.3.0 with updated description

This allows users to assign hotkeys for quick path copying without using context menus.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: ggfevans

.claude/settings.local.json

@@ -8,7 +8,9 @@
       "Bash(npm run format:*)",
       "Bash(git add:*)",
       "WebFetch(domain:github.com)",
-      "Bash(git commit:*)"
+      "Bash(git commit:*)",
+      "Bash(git tag:*)",
+      "Bash(git push:*)"
     ],
     "deny": []
   }