chore: update dependencies and add development guidelines

- Updated `docxtemplater` from 3.66.4 to 3.66.7
- Updated `i18next` from 25.5.3 to 25.6.0
- Updated `@biomejs/biome` from 2.2.4 to 2.2.5
- Updated TypeScript types for `node`, `react`, and `react-dom`
- Added AGENTS.md for development guidelines and best practices
- Added README.md with installation, usage, and development instructions

biome.json

@@ -1,5 +1,5 @@
 {
-  "$schema": "https://biomejs.dev/schemas/2.2.4/schema.json",
+  "$schema": "https://biomejs.dev/schemas/2.2.5/schema.json",
   "vcs": {
     "enabled": true,
     "clientKind": "git",