Document quoted include support in README

- Add examples of quoted include paths
- Explain relative path resolution behavior
- Mention compatibility with tools like Gitpod

Co-authored-by: Ona <no-reply@ona.com>

README.md

@@ -88,8 +88,11 @@ kport supports the SSH `Include` directive, allowing you to organize your SSH co
 - **Glob patterns**: `Include ~/.ssh/config.d/*`
 - **Specific files**: `Include ~/.ssh/work-config`
 - **Relative paths**: `Include config.d/servers`
+- **Quoted paths**: `Include "gitpod/config"` or `Include 'path with spaces/config'`
 - **Cycle detection**: Prevents infinite loops from circular includes
 
+Relative paths in includes are resolved relative to `~/.ssh/` directory, matching OpenSSH behavior.
+
 ## Authentication
 
 The application supports: