docs: add dev blog, update 3.3.0 release notes

[d-v-b]

Summary

• PR adds a developer blog to our docs
• adds a post about the 3.3.0 release.
• updates the release notes for the 3.3.0 release to promise less about the new codec pipeline
• adds a runnable example demonstrating the range coalescing feature
• adds a runnable example demonstrating the new codec pipeline

If merged, I would tag the associated commit with the 3.3.0 tag and cut the release.

For reviewers

Have a look a the blog content, let me know if you want changes.

Author attestation

• I am a human, these are my changes, and I have reviewed and understood every change and can explain why each is correct.

TODO

• Add unit tests and/or doctests in docstrings
• Add docstrings and API docs for any new/modified user-facing classes and functions
• New/modified features documented in docs/user-guide/*.md
• Changes documented as a new file in changes/
• GitHub Actions have all passed
• Test coverage is 100% (Codecov passes)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.99%. Comparing base (6f52da5) to head (2a549d1).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4191   +/-   ##
=======================================
  Coverage   93.99%   93.99%           
=======================================
  Files          91       91           
  Lines       12795    12795           
=======================================
  Hits        12027    12027           
  Misses        768      768           

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.