feat: implement zero-configuration auto-enhancement demo workflow

- Add intelligent auto-enhancement that detects viable content elements
- Replace manual enhancement with automated container-first detection
- Support inline formatting (strong, em, span, links) within editable content
- Streamline demo workflow: just demo shows options, auto-enhances on demand
- Clean up legacy commands and simplify directory structure
- Auto-enhancement goes directly from source to demo-ready (no intermediate dirs)
- Add Dan Eden portfolio and simple test sites for real-world validation
- Auto-enhanced 40 elements in Dan Eden portfolio, 5 in simple site
- Achieve true zero-configuration CMS experience

test-sites/simple/dan-eden-portfolio-demo/_next/static/chunks/main-app-6cb4d4205dbe6682.js

@@ -0,0 +1 @@
+(self.webpackChunk_N_E=self.webpackChunk_N_E||[]).push([[7358],{9288:(e,s,n)=>{Promise.resolve().then(n.t.bind(n,894,23)),Promise.resolve().then(n.t.bind(n,4970,23)),Promise.resolve().then(n.t.bind(n,6614,23)),Promise.resolve().then(n.t.bind(n,6975,23)),Promise.resolve().then(n.t.bind(n,7555,23)),Promise.resolve().then(n.t.bind(n,4911,23)),Promise.resolve().then(n.t.bind(n,9665,23)),Promise.resolve().then(n.t.bind(n,1295,23))},9393:()=>{}},e=>{var s=s=>e(e.s=s);e.O(0,[8441,1684],()=>(s(5415),s(9288))),_N_E=e.O()}]);