v1.3.0 - xx chain multi-asset-gating configuration file

• Add sample configuration in NextJS .env for asset-gating with multiple assets and levels (closes #2, it's close enough)
• Add sample code:
  • home page: show settings as JSON and HTML table) on the home page before login
  • auth page: check hard-coded assetId against JSON to show how matching could be done
• Improve documentation

v1.2.1 - with xx chain asset-gating

• Add asset-gating to CLI and UI
• Remove Vercel analytics module (not necessary)

v1.1.1 - with xx coin balance

v1.1.1 works for both authentication and xx coin balance lookup.

v1.0 - initial w/o xx coin balance

v1.0 works in terms of authentication but shows no xx wallet balance as mentioned in xx_README.md. In that sense it only validates the address and doesn't do any balance or token checking.