Typing updates for strict mode

[samaloney]

• Updates code and configs for strict mode and add pyright configuration

[codecov]

Codecov Report

❌ Patch coverage is 97.29730% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.63%. Comparing base (17a2716) to head (444fd11).

Files with missing lines	Patch %	Lines
xrayvision/coordinates/frames.py	80.00%	1 Missing ⚠️
xrayvision/mem.py	95.45%	1 Missing ⚠️
xrayvision/visibility.py	97.29%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #97      +/-   ##
==========================================
- Coverage   92.39%   89.63%   -2.77%     
==========================================
  Files          14        8       -6     
  Lines        1591      955     -636     
==========================================
- Hits         1470      856     -614     
+ Misses        121       99      -22     

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[Copilot]

Pull request overview

This PR updates xrayvision to support stricter static type checking (mypy strict mode + pyright strict), primarily by tightening type annotations, adding targeted casts/ignores for untyped decorators, and adjusting a few configuration files to align tooling behavior.

Changes:

• Adds/updates type annotations across core modules (visibility, imaging, transform, mem, clean, coordinates frames) to satisfy stricter type checkers.
• Introduces strict mypy and pyright configuration in pyproject.toml and updates pre-commit hooks accordingly.
• Minor housekeeping updates to packaging/examples/changelog/coverage configuration.

Reviewed changes

Copilot reviewed 13 out of 14 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
xrayvision/visibility.py	Adds typing/casts for metadata and visibility accessors; updates ABC signatures.
xrayvision/transform.py	Adds typing for NDArray generics and suppresses untyped decorators.
xrayvision/mem.py	Adds typing/casts and small refactors for strict checker compatibility.
xrayvision/imaging.py	Adds typing, clarifies return variables, tightens scheme type annotations.
xrayvision/coordinates/frames.py	Adds casts/ignores to satisfy strict typing around coordinate frames/WCS.
xrayvision/clean.py	Adds typing, refines array typing, and makes docstring concatenation safe under strict mode.
xrayvision/init.py	Suppresses an attr-defined type-checking warning for __version__.
pyproject.toml	Enables mypy strict mode and adds a strict pyright configuration.
MANIFEST.in	Minor formatting-only change.
examples/stix.py	Makes percent_lambda a Quantity (apu.percent).
changelog/97.feature.rst	Adds changelog entry for strict typing updates and configs.
.pre-commit-config.yaml	Updates hook versions and mypy hook configuration; adds repo-level exclude.
.gitignore	Removes initial header comments.
.coveragerc	Expands coverage omit patterns (including tests and _sunpy_init).

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