Initial commit: bip-sda project scaffold

Electron + TypeScript project initialized with electron-vite,
electron-builder, ESLint, and Prettier configuration.

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

tsconfig.node.json

@@ -0,0 +1,8 @@
+{
+  "extends": "@electron-toolkit/tsconfig/tsconfig.node.json",
+  "include": ["electron.vite.config.*", "src/main/**/*", "src/preload/**/*"],
+  "compilerOptions": {
+    "composite": true,
+    "types": ["electron-vite/node"]
+  }
+}