Migrates Package Management to UV pyproject Management

[WeatherGod3218]

What

what the PR changes

This PR moves away from the manual installation of requirement.txt files and instead uses the UV package managers' syncing method

Why

why these changes were made

These changes were made to simplify dependency management, rather than having multiple separate requirements.txt files.

Another choice to do this migration was to encourage the use of modern tools, such as UV, rather than skipping over them. The updated documentation includes all the commands that somebody would need to get adjusted to UV, and aims to promote the use of newer and better technologies

Test Plan

how did you verify these changes did what you expected

The Dockerfile runs as expected, and the localhost web server functions properly

Env Vars

did you add, remove, or rename any environment variables

REMOVED SLACK_JUMPSTART_MESSAGE: This env var was redundant anyways, as the message was hardcoded into config.py. This can be added back at a later date if wanted.

Side Note: The Docker Compose file now uses an .env-file: rather than hardcoding each environment variable in an .env section.

Documentation

did you add or update any documentation. PRs should, at the minimum, update documentation when they make existing documentation out of date.

Documentation has been extensively updated in the README.md to help guide people on how to use UV for the project. It also includes the updated steps for developing locally.

Checklist

• Tested all changes locally