docs: add TRAC portal + Termux quickstart + TNK reward address

[kulon666]

Summary

This PR updates my intercom-swap fork with a usability-focused layer:

• A simple local TRAC web portal (quick links + copyable address)
• A Termux-friendly quickstart workflow
• A clear TRAC reward address for TNK fork program review

The goal is to make the fork easier to run and verify for operators/users without changing core protocol logic.

What changed

• README: adds fork purpose, TNK eligibility notes, and a step-by-step quickstart
• TRAC reward address included for reviewers/operators
• Local web portal under site/ (serve via python -m http.server)

How to test (quick)

git clone https://github.com/kulon666/intercom-swap.git
cd intercom-swap
npm install
node index.js

[kulon666]

cd site
python -m http.server 8787

open: http://127.0.0.1:8787