chore: set up pre-commit framework with general hooks

Add .pre-commit-config.yaml with pre-commit-hooks v5.0.0 (trailing
whitespace, end-of-file fixer, yaml/json checks, large file guard,
merge conflict detection). Add minimal pyproject.toml. Auto-fix
trailing whitespace and missing end-of-file newlines across the
codebase.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/tools/component.txt

@@ -11,16 +11,16 @@ type CommandFunction = (command: string, params: any) => Promise<any>;
 
 /**
  * Register component management tools with the MCP server
- * 
+ *
  * @param server MCP server instance
  * @param callKicadScript Function to call KiCAD script commands
  */
 export function registerComponentTools(server: McpServer, callKicadScript: CommandFunction): void {
   logger.info('Registering component management tools');
-  
+
   // ------------------------------------------------------
   // Place Component Tool
   // ------------------------------------------------------
   server.registerTool({
     name: "place_component",
-    description: "Places a component on the PCB at the specified location",
+    description: "Places a component on the PCB at the specified location",