Add vantagetv.ee

[freearhey]

Closes #2997

npm test --- vantagetv.ee

> test
> cross-env TZ=Pacific/Nauru npx jest --runInBand vantagetv.ee

 PASS  sites/vantagetv.ee/vantagetv.ee.test.js
  ✓ can generate valid url (4 ms)
  ✓ can parse response (76 ms)
  ✓ can handle empty guide (1 ms)

Test Suites: 1 passed, 1 total
Tests:       3 passed, 3 total
Snapshots:   0 total
Time:        0.415 s, estimated 1 s
Ran all test suites matching vantagetv.ee.

npm run grab --- --site=vantagetv.ee

> grab
> tsx scripts/commands/epg/grab.ts --site=vantagetv.ee

info starting...
info loading channels...
info found 3 channel(s)
info loading api data...
info creating queue...
info run:
info   [1/6] vantagetv.ee (en) - VantageMusic.ee@SD - Feb 3, 2026 (10 programs)
info   [2/6] vantagetv.ee (en) - VantageMusic.ee@SD - Feb 4, 2026 (10 programs)
info   [3/6] vantagetv.ee (en) - vrock - Feb 4, 2026 (3 programs)
info   [4/6] vantagetv.ee (en) - vrock - Feb 3, 2026 (3 programs)
info   [5/6] vantagetv.ee (en) - vdance - Feb 4, 2026 (9 programs)
info   [6/6] vantagetv.ee (en) - vdance - Feb 3, 2026 (9 programs)
info   saving to "guide.xml"...
success   done in 00h 00m 00s