Windows CLI MCP Server

# server/serverImplementation - **pre-resolves enabled shell configurations** – ensures the server computes resolved settings for enabled shells at startup. - **lists only enabled shells** – verifies that helper methods return the correct list of active shells. - **uses initialDir from global config** – tests that a valid `initialDir` changes the server's starting working directory. - **validates CWD against global allowed paths** – checks that starting in a disallowed directory leaves the active working directory undefined. - **handles initializeWorkingDirectory with restrictWorkingDirectory** – confirms that invalid initial directories are ignored when restrictions are enabled.