feature: migration dvf en TypeScript

parse.js/sync.js/lib/dotenv.js -> .ts (run via tsx), ajout tsconfig.json,
eslint config TS-enabled (parser tseslint + resolver typescript), devDeps
typescript/typescript-eslint/tsx/eslint-import-resolver-typescript,
scripts package.json en tsx + typecheck, .lintstagedrc *.ts, README en tsx.
Fix securite: escapeId sur les identifiants de colonnes dans sync.ts (au lieu
de backticks bruts) pour ne pas casser/injecter via un en-tete CSV distant.
Suppression du todo.txt audit (finding escapeId traite).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tsconfig.json

@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "target": "ES2024",
+        "module": "NodeNext",
+        "moduleResolution": "NodeNext",
+        "allowJs": true,
+        "checkJs": false,
+        "noEmit": true,
+        "allowImportingTsExtensions": true,
+        "rewriteRelativeImportExtensions": false,
+        "isolatedModules": true,
+        "verbatimModuleSyntax": false,
+        "esModuleInterop": true,
+        "resolveJsonModule": true,
+        "skipLibCheck": true,
+        "strict": false,
+        "noImplicitAny": false,
+        "strictNullChecks": false,
+        "forceConsistentCasingInFileNames": true
+    },
+    "include": ["*.ts", "lib/**/*.ts"],
+    "exclude": ["node_modules", "dvf", "geodvf", "coverage", "dist"]
+}