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>

.vscode/extensions.json

@@ -0,0 +1,3 @@
+{
+  "recommendations": ["dbaeumer.vscode-eslint"]
+}