* fix(#92944): add StateTimeline Null+NaN handling
* chore: remove console.warns from debugging
* test: initialize a couple of simple tests
* test: more tests for hasMappedNaN and hasMappedNull
* chore: revert some of the let-const syntax cleanup for a later PR
* chore: rename should draw method
* chore: fix comment typo
* refactor(timeline-chart-utils): un-nest hasSpecialMappedValue() helper
* test(timeline-chart-utils): unit test hasSpecialMappedValue() helper
* chore: fix code comment typos in changed files
* refactor(timeline-chart): reduce helper DRY-ness for better performance
* fix(timeline-chart): check Y value for truthiness, not if it is finite
* test(state-timeline): additional gdev test panels with null + NN values
* fix(timeline-chart): allow Y value of zero in checks
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Co-authored-by: Jesse David Peterson <jesdavpet@users.noreply.github.com>
Co-authored-by: Adela Almasan <adela.almasan@grafana.com>
Josh Hunt
Jesse David Peterson
Paul Marbach
Ryan McKinley
Torkel Ödegaard
Victor Marin