replaced ai provider with vercel ai sdk

[DavertMik]

Replaced AI provider to use Vercel AI SDK

[github-actions]

	🟢 UNIT-TESTS PASSED
Tests	✔️ 356 tests run
Summary	🟢 354 passed; 🟡 2 skipped
Duration	🕐 7 seconds
Job	🗂️ Run Unit tests / unit-tests
Operating System	🖥️ Linux X64

🐢 Slowest Tests

• Workers: should run worker with multiple config (1.863 seconds)
• Workers: should run worker with custom config (0.641 seconds)
• Workers: should run simple worker (0.634 seconds)
• subtitles: should capture separate steps for separate tests (0.602 seconds)
• Workers: should create worker by function (0.592 seconds)

[github-actions]

	🟢 RUNNER-TESTS PASSED
Tests	✔️ 195 tests run
Summary	🟢 195 passed; 🟡 0 skipped
Duration	🕐 3 minutes, 54 seconds
Job	🗂️ Run Unit tests / runner-tests
Operating System	🖥️ Linux X64

🐢 Slowest Tests

• CodeceptJS Timeouts: should take --no-timeouts option (6.538 seconds)
• Definitions: def should create definition file (6.128 seconds)
• CodeceptJS Timeouts: should stop test when timeout exceeded (5.511 seconds)
• CodeceptJS Timeouts: should prefer step timeout (4.724 seconds)
• Definitions: def should create definition file with correct page def (4.485 seconds)