feat: add file reading functionality and integrate system agents

- Introduced FileService to handle file reading operations via IPC.
- Implemented a new IPC handler for reading files, enhancing the application's ability to access and manage data.
- Integrated system agents from a JSON file, allowing dynamic loading of agent data into the application.
- Updated the AgentsPage and AddAssistantPopup components to utilize the new system agents, improving user experience and functionality.
- Enhanced application state management by adding resourcesPath to the runtime state, ensuring proper resource handling across components.

src/main/services/FileService.ts

@@ -0,0 +1,7 @@
+import fs from 'node:fs'
+
+export default class FileService {
+  public static async readFile(_: Electron.IpcMainInvokeEvent, path: string) {
+    return fs.readFileSync(path, 'utf8')
+  }
+}