Remove typing imports for List, Tuple, Union

[delucchi-cmu]

Closes #406.

We still have statements like:

from typing import Iterable, Optional, Callable, Type, TYPE_CHECKING
from typing_extensions import Self

[github-actions]

Before [e3d899a] <v0.4.5>	After [28e619f]	Ratio	Benchmark (Parameter)
1.03±0.03ms	1.03±0.02ms	1.01	benchmarks.time_test_cone_filter_multiple_order
367±3ms	368±1ms	1	benchmarks.Suite.time_outer_pixel_alignment
40.0±0.4ms	39.9±0.7ms	1	benchmarks.Suite.time_pixel_tree_creation
116±0.3ms	116±0.6ms	1	benchmarks.time_test_alignment_even_sky
13.4±0.5ms	13.3±0.5ms	0.99	benchmarks.Suite.time_inner_pixel_alignment
19.5±0.1ms	19.1±0.1ms	0.98	benchmarks.MetadataSuite.time_load_partition_info_order6
77.2±0.5ms	75.8±0.4ms	0.98	benchmarks.MetadataSuite.time_load_partition_join_info
78.1±0.4ms	76.1±0.7ms	0.97	benchmarks.MetadataSuite.time_load_partition_info_order7

Click here to view all benchmarks.

[codecov]

Codecov Report

Attention: Patch coverage is 98.27586% with 1 line in your changes missing coverage. Please review.

Project coverage is 93.24%. Comparing base (e3d899a) to head (31ea4a8).
Report is 26 commits behind head on main.

Files with missing lines	Patch %	Lines
src/hats/pixel_math/filter.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #441      +/-   ##
==========================================
- Coverage   93.26%   93.24%   -0.03%     
==========================================
  Files          47       47              
  Lines        2034     2012      -22     
==========================================
- Hits         1897     1876      -21     
+ Misses        137      136       -1     

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