chore(ci): Automated release creation

[mrickard]

Changed title of main workflow, to be standardized with other repos.
Added NEWS.md release history
Added release prep, creation, and pr validation workflows from aws-sdk repo

Closes #390
Closes NR-184573

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 35.14%. Comparing base (89d350a) to head (b3497ca).

❗ Current head b3497ca differs from pull request most recent head ba128e1. Consider uploading reports for the commit ba128e1 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #421   +/-   ##
=======================================
  Coverage   35.14%   35.14%           
=======================================
  Files           4        4           
  Lines         552      552           
  Branches      149      149           
=======================================
  Hits          194      194           
  Misses        329      329           
  Partials       29       29           

Flag	Coverage Δ
unit-tests	35.14% <ø> (ø)

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[bizob2828]

Overall looks fine and hard to test until we actually have to release. One comment on changelog but you'll need a few more things:

• I would add a pull request template
• add dependabot.yml to control conventional commits for its Prs

You can see examples here

Also you're going to want to update the pull request settings:

• only squash merges and use pull request title
• delete head branches

[mrickard]

@bizob2828 I've updated the PR settings as well as adding templates.