consolidate build scripts, reorganize source into src/ directory, fix favicon injection

src/shims/process.js

@@ -0,0 +1,19 @@
+export const processShim = {
+  platform: "linux",
+  versions: {
+    electron: "28.0.0",
+    node: "18.18.0",
+    chrome: "120.0.0.0",
+  },
+  env: {},
+  cwd: () => "/",
+  nextTick: (fn, ...args) => setTimeout(() => fn(...args), 0),
+  argv: [],
+  type: "renderer",
+  resourcesPath: "/",
+  stdout: { write: (s) => console.log(s) },
+  stderr: { write: (s) => console.error(s) },
+  on: () => {},
+  once: () => {},
+  removeListener: () => {},
+};