chore: consolidate Ruff configs, add prettier dependancy and updated documentation usage

- Remove per-package Black, Ruff, and MyPy settings in individual pyproject.toml files
- Centralize Ruff configuration in root pyproject.toml under [tool.ruff.lint] with selected ignores
- Add Prettier setup and usage instructions to Development.md
- Include pnpm install instructions for JS/TS dependencies
- Ensure pre-commit hooks enforce Python and JS/TS formatting consistently

package.json

@@ -0,0 +1,9 @@
+{
+  "scripts": {
+    "prettier:check": "prettier --check '**/*.{ts,tsx,js,jsx,json,md,yaml,yml}'",
+    "prettier:format": "prettier --write '**/*.{ts,tsx,js,jsx,json,md,yaml,yml}'"
+  },
+  "devDependencies": {
+    "prettier": "^3.6.2"
+  }
+}