Implemented-gemini

[Reion19]

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[ ✅ ] Have you followed the guidelines in our Contributing document?
[ ✅ ] Have you checked to ensure there aren't other open Pull Requests for the same update/change?
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Summary of Changes

This PR includes 6 commits, most of which focus on refactoring the existing codebase.
Key Changes:

Added support for Google Gemini
Full integration of Gemini LLM support. Functionality has been tested manually.

Refactored internal code structure
Improved clarity, maintainability, and consistency across the gem.

Updated README
Rewrote usage instructions to reflect the new configuration flow and multi-provider setup.

Need to write an Specs for new functionality and rewrite existing specs.

Let me know if further testing or adjustments are needed.

[a1xsh]

@Reion19 i see one problem in your pull requests, its's hard to review it cause they have changes from your whole working branch.
Here is solution - made PR's not to main branch but to your working branch

[Reion19]

@Reion19 i see one problem in your pull requests, its's hard to review it cause they have changes from your whole working branch. Here is solution - made PR's not to main branch but to your working branch

unfortunately, it's impossible to make an pull request to branch that is not approved to origin.

It's only possible when i create an PR to my repo, not to the origin