Initial commit: twitter-cli for posting tweets via GraphQL API

Features:
- Post tweets and replies via Twitter GraphQL API
- Cookie extraction from Chrome (macOS)
- Env var and CLI argument authentication
- 19 passing tests with vitest
- Biome for linting

vitest.config.ts

@@ -0,0 +1,15 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+	test: {
+		globals: true,
+		environment: 'node',
+		include: ['tests/**/*.test.ts'],
+		coverage: {
+			provider: 'v8',
+			reporter: ['text', 'html'],
+			include: ['src/**/*.ts'],
+			exclude: ['src/index.ts'],
+		},
+	},
+});