feat: support Linux. Refactor resources architecture. Create build script

Currently, themes are disabled and firefox notification too.

preload.js

@@ -9,6 +9,11 @@ const { contextBridge, ipcRenderer } = require("electron");
  */
 contextBridge.exposeInMainWorld("electronAPI", {
 
+  /**
+   * Return process.platform to renderer
+   */
+  getProcessPlatform: () => process.platform,
+
   /**
    * Returns the default system download directory.
    */