Implement rendering options

[MaddyGuthridge]

Resolves #88

• Add definition for Options dataclass, which can be passed to tag constructors to control rendering.
• Update tag code to accept Options objects and pass them to other classes during rendering.
• Make use of Options during rendering to control how HTML is rendered.
• Document how to use Options class to control rendering
• Allow certain tags (especially <p>) to specify default options to apply, so that paragraphs don't have weird spacing without requiring any changes.

Important: this breaks compatibility with Python 3.9 due to using kw_only=True for the dataclass.

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
1446	1446	100%	0%	🟢

New Files

File	Coverage	Status
pyhtml/__render_options.py	100%	🟢
tests/render_options_test.py	100%	🟢
TOTAL	100%	🟢

Modified Files

File	Coverage	Status
pyhtml/init.py	100%	🟢
pyhtml/__tag_base.py	100%	🟢
pyhtml/__tags/init.py	100%	🟢
pyhtml/__tags/comment.py	100%	🟢
pyhtml/__tags/dangerous_raw_html.py	100%	🟢
pyhtml/__tags/generated.py	100%	🟢
pyhtml/__tags/input_tag.py	100%	🟢
pyhtml/__types.py	100%	🟢
pyhtml/__util.py	100%	🟢
tests/basic_rendering_test.py	100%	🟢
tests/end_to_end/flask_test.py	100%	🟢
tests/escape_test.py	100%	🟢
TOTAL	100%	🟢

updated for commit: 7004c26 by action🐍