connect #2788

resolves #2657

* Add Grok/XAI support for LLM & agents

* forgot files

* support openai o1 models

* Prevent O1 use for agents
getter for isO1Model;

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Co-authored-by: timothycarambat <rambat1010@gmail.com>

* add deepseek support

* lint

* update deepseek context length

* add deepseek to onboarding

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Co-authored-by: Timothy Carambat <rambat1010@gmail.com>

Add Gemini  models
resolves #2263

* Enable agent context windows to be accurate per provider:model

* Refactor model mapping to external file
Add token count to document length instead of char-count
refernce promptWindowLimit from AIProvider in central location

* remove unused imports