Add NumdiffResult object

[timmens]

• Update pre-commit hooks and add numpy to pre-commit mypy environment
• Add NumdiffResult object
• Add type hints to the first and second derivative outer interface
• Deprecate Richardson extrapolation options as well as return_func_value argument
• Test deprecations
• Update documentation

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[codecov]

Codecov Report

Attention: Patch coverage is 98.93617% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/optimagic/differentiation/derivatives.py	98.38%	1 Missing ⚠️

Files with missing lines	Coverage Δ
src/optimagic/deprecations.py	100.00% <100.00%> (ø)
src/optimagic/optimization/optimize_result.py	93.98% <100.00%> (ø)
src/optimagic/differentiation/derivatives.py	98.05% <98.38%> (ø)

[janosg]

Very nice PR. I just have comments about the documentation.