refactor: migrate from Webpack to Vite for build and development processes

- Updated package.json to replace Webpack scripts with Vite commands.
- Added necessary Vite plugins and dependencies for legacy support, environment variables, and string handling.
- Refactored CSS imports in JavaScript files to use ES module syntax and removed duplicates.
- Updated markdown-lint integration to directly import the library.
- Removed old Webpack include statements from EJS templates and replaced them with Vite asset generation.
- Created a new Vite configuration file to define build inputs, output directory, and server settings.
- Ensured compatibility with existing assets and paths during the migration process.

Author: Yukaii

.nvmrc

@@ -1 +1 @@
-v16.20.2
+lts/hydrogen