build: bump version to 0.10.1

refactor: no need for conditional check in __call__

refactor: change how doctype is prepended to html element

refactor: move raise into else condition for clarity

refactor: only use Html new type in __str__ method

refactor: using f-string improves performance

docs: improve copywrite for examples section

docs: link to repository examples that use haitch

docs: remove img tag example

Image tag is a void element and should not be included in the Element
docstring.

docs: add "releases" section to readme

build: bump version to 0.10.0

feat: add most common semantic elements

Implements: https://todo.sr.ht/~loges/haitch/9

build: check if code is unformatted

build: add command for formatting code with ruff

build: move lint check to default env

docs: link sourcehut tickets to changelog entries

build: bump version to 0.9.0

fix: quiet diagnostic warning with `elif`

feat: pass unescaped HTML with `unsafe` component

Implements: https://todo.sr.ht/~loges/haitch/12

docs: fix heading level for fixes