Make point_map.fits plotting more friendly.

[delucchi-cmu]

Closes #417.

See example notebook: https://github.com/lincc-frameworks/notebooks_lf/blob/main/sprints/2024/11_26/plot_density_v3.ipynb

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.29%. Comparing base (56321ef) to head (d855202).
Report is 19 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #439      +/-   ##
==========================================
+ Coverage   92.90%   93.29%   +0.39%     
==========================================
  Files          47       47              
  Lines        2029     2044      +15     
==========================================
+ Hits         1885     1907      +22     
+ Misses        144      137       -7     

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[github-actions]

Before [56321ef]	After [592db70]	Ratio	Benchmark (Parameter)
23.5±0.2ms	23.6±0.09ms	1	benchmarks.MetadataSuite.time_load_partition_info_order6
124±1ms	125±2ms	1	benchmarks.time_test_alignment_even_sky
94.7±0.6ms	94.2±0.5ms	0.99	benchmarks.MetadataSuite.time_load_partition_join_info
382±1ms	379±2ms	0.99	benchmarks.Suite.time_outer_pixel_alignment
110±1ms	109±1ms	0.99	benchmarks.Suite.time_paths_creation
47.0±0.6ms	46.5±0.9ms	0.99	benchmarks.Suite.time_pixel_tree_creation
95.8±0.8ms	94.0±0.5ms	0.98	benchmarks.MetadataSuite.time_load_partition_info_order7
13.3±0.4ms	13.0±0.5ms	0.98	benchmarks.Suite.time_inner_pixel_alignment
1.05±0.03ms	1.02±0.01ms	0.97	benchmarks.time_test_cone_filter_multiple_order

Click here to view all benchmarks.

[hombit]

Thank you. See a couple of suggestions below.