chore: Start 0.10.0 development

[andygrove]

Which issue does this PR close?

Part of #1856

Rationale for this change

Now that branch-0.9 has been created, main is for 0.10.0-SNAPSHOT development.

What changes are included in this PR?

How are these changes tested?

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 58.11%. Comparing base (f09f8af) to head (6401b67).
Report is 310 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1958      +/-   ##
============================================
+ Coverage     56.12%   58.11%   +1.98%     
- Complexity      976     1154     +178     
============================================
  Files           119      132      +13     
  Lines         11743    13022    +1279     
  Branches       2251     2417     +166     
============================================
+ Hits           6591     7568     +977     
- Misses         4012     4225     +213     
- Partials       1140     1229      +89     

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[comphead]

lgtm thanks @andygrove

[andygrove]

Moving to draft so that we don't merge this until #1830 is merged