* 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
* Added Supported Models Free Tier - chat_models.txt
Need to fill in correct Parameter Count.
* Bump perplexity model
closes#1901closes#1900
---------
Co-authored-by: Tim-Hoekstra <135951177+Tim-Hoekstra@users.noreply.github.com>
* add LLM support for perplexity
* update README & example env
* fix ENV keys in example env files
* slight changes for QA of perplexity support
* Update Perplexity AI name
---------
Co-authored-by: timothycarambat <rambat1010@gmail.com>