Replace get_changes in dev with custom solution for automating changelog updates

[merobi-hub]

Problem

Our current solution for automating changelog updates relies on a fork of an external project and does not format entries correctly or provide all the data we need about changes.

Solution

This custom solution uses PyGithub to get all pulls since a specified tag, bot version bumps excepted, and formats them like existing entries in the log. It also supplies a release title with a correctly formatted URL, includes one-line descriptions if provided by authors, and more. Also included: a method for getting new contributors, an updated README and requirements.txt, and updated .gitignore.

Note: All database schema changes require discussion. Please link the issue for context.

One-line summary: replaces get_changes in dev with custom solution

Checklist

• You've signed-off your work
• Your changes are accompanied by tests (if relevant)
• Your change contains a small diff and is self-contained
• You've updated any relevant documentation (if relevant)
• You've included a one-line summary of your change for the CHANGELOG.md (Depending on the change, this may not be necessary).
• You've versioned your .sql database schema migration according to Flyway's naming convention (if relevant)
• You've included a header in any source code files (if relevant)

[netlify]

✅ Deploy Preview for peppy-sprite-186812 canceled.

Name	Link
🔨 Latest commit	857c50d
🔍 Latest deploy log	https://app.netlify.com/sites/peppy-sprite-186812/deploys/653a83bde14d67000816eaa6

[codecov]

Codecov Report

Merging #2659 (857c50d) into main (5c42dfd) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main    #2659   +/-   ##
=========================================
  Coverage     83.35%   83.35%           
  Complexity     1295     1295           
=========================================
  Files           244      244           
  Lines          5948     5948           
  Branches        279      279           
=========================================
  Hits           4958     4958           
  Misses          844      844           
  Partials        146      146           

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