Connect LLM via API of OpenRouter

Closes #67 (closed)

changed milestone to %Sprint_5

added AI label

requested review from @m.trifonov

assigned to @ar.grishin

added 10 commits

• bbb84dd2...efef9ed4 - 8 commits from branch dev
• b9fc5a3d - Merge branch 'dev' of https://gitlab.pg.innopolis.university/m.trifonov/ragnar...
• 822fbd93 - Set default LLM: google/gemma-7b-it:free and connect with API of openrouter

Compare with previous version

approved this merge request

mentioned in commit 16e224cd

merged