chore(packages): replace helpers with standalone chroma-lexers and enrich shared

- Replace helpers dispatcher pattern with standalone chroma-lexers package
- Add runCommand, fromRoot, consola re-export to shared
- Update versioning and integration to use shared utilities
- Shorten dev version format: base36 timestamp, no hash
- Rename eslint.config.js to eslint.config.ts (add jiti)
- Add README.md to each package

packages/integration/README.md

@@ -0,0 +1,15 @@
+# @hugo-fixit/integration
+
+Post-build script that merges `apps/demo` and `apps/test` build outputs into a unified `public/` directory.
+
+## Usage
+
+```bash
+pnpm -F integration start
+```
+
+## How it works
+
+1. Removes the existing `public/` directory
+2. Copies `apps/demo/public/` into `public/`
+3. Copies `apps/test/public/` into `public/test/`

packages/integration/src/index.ts

@@ -1,9 +1,8 @@
-import path from 'node:path'
-import { workspaceRoot } from '@hugo-fixit/shared'
+import { fromRoot } from '@hugo-fixit/shared'
 import fsExtra from 'fs-extra'
 
 const { copySync, removeSync } = fsExtra
 
-removeSync(path.join(workspaceRoot, 'public'))
-copySync(path.join(workspaceRoot, 'apps/demo/public'), path.join(workspaceRoot, 'public'), { overwrite: true })
-copySync(path.join(workspaceRoot, 'apps/test/public'), path.join(workspaceRoot, 'public/test'), { overwrite: true })
+removeSync(fromRoot('public'))
+copySync(fromRoot('apps/demo/public'), fromRoot('public'), { overwrite: true })
+copySync(fromRoot('apps/test/public'), fromRoot('public/test'), { overwrite: true })