refactor: re-layput project

- move assets (raw jsons, icons, meshes and i18n data) into the root of repo.
- move script into the root of repo.
- modify blender manifest according to this changes.
- optimize gitignore.

scripts/pyproject.toml

@@ -0,0 +1,9 @@
+[project]
+name = "scripts"
+version = "1.0.0"
+requires-python = ">=3.11"
+dependencies = [
+    "pillow==10.2.0",
+    "polib>=1.2.0",
+    "pydantic>=2.11.7",
+]