Add Vite 8 support, BoxLang layout paths, and comprehensive docs

- Bump version to 4.0.0
- Update peerDependencies to include Vite 7 and 8
- Update devDependencies: vite ^8.0.0, esbuild ^0.28.0
- Add appRefreshPaths export for BoxLang / tiered app layout
  (app/layouts/**, app/views/**, app/config/Router.bx)
- Guard chunk.viteMetadata?.importedCss in renderChunk for Rolldown
  compatibility (Vite 8 may not set viteMetadata on every chunk)
- Replace Manifest import from vite with a local type definition to
  avoid breakage if Vite renames the type in future versions
- Replace any-typed renderChunk chunk param with ViteChunk interface
- Fix resolveManifestConfig fallback to use .vite/manifest.json
  (Vite 5+ default) instead of manifest.json
- Add package.json "type": "module" to support ESM eslint.config.js
- Migrate ESLint config from .eslintrc.js to eslint.config.js (flat
  config, required for ESLint 9)
- Update CI Node versions: 14/16/18 -> 18/20/22; upgrade actions to v4
- Rewrite README with full documentation: both layout configurations,
  configuration reference table, refresh paths, aliases, SSR, Inertia,
  env vars, and framework integration examples
- Add tests for appRefreshPaths, BoxLang layout outDir, and refresh
  with appRefreshPaths (29 tests total, all passing)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011e6SYiDYZZazmdKsssrG5D

Author: claude

.eslintrc.js

@@ -12,14 +12,14 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [14.x, 16.x, 18.x]
+        node-version: [18.x, 20.x, 22.x]
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}