Add polar-aware rlabel and thetalabel support (#714)

* Fix PolarAxes.format() silently dropping xlabel/ylabel

* Add polar-aware rlabel and thetalabel support

Co-authored-by: Copilot <copilot@github.com>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* rm formatting of x/y labels for polar

* rm keywords from format

* variables from loop

* rm more variables from the loop

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Co-authored-by: Copilot <copilot@github.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Casper van Elteren <caspervanelteren@gmail.com>

Fix/norm inputs (#693)

* Implement fix for 689

Chore: redo zenodo sync (#685)

Fix scm part 3

Fix scm not working (#682)

Fix regression of spanning colorbars (#681)

* Fix regression of spanning colorbars

* Default to parent when span is not given

Fix regression of spanning colorbars (#681)

* Fix regression of spanning colorbars

* Default to parent when span is not given

Fix choropleth horizontal line artifacts on projected maps (#668)

* Fix choropleth horizontal line artifacts on projected maps

Use Cartopy's project_geometry() instead of transform_points() for
choropleth polygon projection. transform_points() projects vertices
independently without geometric awareness, so polygons crossing the
antimeridian (e.g. Russia) produce path segments that jump across the
entire map, rendering as visible horizontal lines.

project_geometry() properly splits and clips polygons at projection
boundaries before converting to matplotlib paths, eliminating the
artifacts on all projections (Robinson, Mercator, Mollweide, etc.).

* Black

Release v2.1.3

Fix contour level color mapping with explicit limits (#599)

* Fix contour level color mapping with explicit limits

* Update ultraplot/axes/plot.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Fix `_parse_level_norm` docstring to reflect conditional return type (#600)

* Initial plan

* Update _parse_level_norm docstring Returns section to reflect possible return types

Co-authored-by: cvanelteren <19485143+cvanelteren@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Casper van Elteren <caspervanelteren@gmail.com>
Co-authored-by: cvanelteren <19485143+cvanelteren@users.noreply.github.com>

* Scope explicit contour limits to line contours

* Pass vmin/vmax through automatic level generation

* Restore default tricontour discrete mapping

* Format contour norm routing changes

* Clarify contour norm routing docs

* Refactor contour norm routing flow

* Refactor contour norm routing flags

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Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>
Co-authored-by: cvanelteren <19485143+cvanelteren@users.noreply.github.com>