[ADD] added multi provider class and its structure part to handle it.

[ADD]ADDED multiple llm porvider options with token and trial argument from fronend. added semanctic search with odoo docs as a context before going to code.

[ADD][IMP] ADDED Tools : Odoo 16 to 18 version code generation, Odoo job search with indeed options, Odoo RAG with code generation with applicable of search.

Create Gradio_UI.py