Update package setup, README, HISTORY/CHANGELOG to new system

[brews]

Migrate dodola package setup, build, configuration from setup.py to pyproject.toml and setup.cfg. This follows updated best practices in python packaging.

• Migrates README from RST to Markdown.
• Migrate HISTORY.rst to CHANGELOG.md, following https://keepachangelog.com.

[brews]

This is currently failing to build because we don't copy git stuff into the container image, but setup_tools_scm looks for git to get package version.

I'll need to address this in another PR. For now, we can fall back to using the dumb static version as users currently only interact with our release versions through container tags. Not ideal but 🤷 .

[brews]

Dropped gergel from review 'cause she's crazy busy.

[brews]

Merging this to meet a new deadline but please let me know here or in open issues if you have questions or suggestions on this @emileten. You input is valued.

[emileten]

@brews yea I recently came across these .toml and .cfg files to package python. I didn't know it's best practice. Do you have some source/reference that explains why ? (Just my curiosity, no issue).

[emileten]

Got it I think ! The official :) https://packaging.python.org/en/latest/tutorials/packaging-projects/