fix!: remove webp transformer

- Introduced a migration system for manifest files to support versioning and backward compatibility.
- Updated image processing to switch thumbnail format from WebP to JPEG for better compatibility.
- Added new commands for manifest migration and improved thumbnail handling in the builder.
- Enhanced documentation with architecture details and development commands.

Signed-off-by: Innei <tukon479@gmail.com>

package.json

@@ -20,6 +20,7 @@
     "extract:font": "tsx scripts/extract-font-glyphs.ts",
     "format": "prettier --write \"src/**/*.ts\" ",
     "lint": "eslint --fix",
+    "migrate:manifest": "tsx scripts/migrate-manifest.ts",
     "preinstall": "sh scripts/preinstall.sh",
     "prepare": "simple-git-hooks",
     "update:lastmodified": "tsx scripts/update-lastmodified.ts"