[Refactor] dependencies upgrade

[jshuadvd]

Description

Upgraded the dependencies in the pyproject.toml file to begin the transition to the full use of Poetry.

This includes:

• Upgrade existing dependencies to their latest versions.
• Add new dependencies to eventually replace those previously managed by requirements.txt.
• (If this approach is problematic, please let me know, I can provide more reasoning as to only using poetry if need be.)
• Refactoring imports for LangChain due to updates in their library.

Dependencies

Updated and added dependencies include:

• python = "~3.11.0"
• langchain = "~0.1"
• tensorflow = "^2.12.0"
• pre-commit = "^3.6.2"
• pylint = "^3.1.0"
• pytest = "^8.0.2"
• numpy = "^1.26.4"
• langchain-core = "^0.1.28"
• langchain-community = "^0.0.24"

Twitter Handle

here's the handle to use: @jshuadvd

FYI, This bit needs to be updated for PRS:

Run make format, make lint, and make test to check this locally.