12.2
docs: Update and add links to section on reading git history.
docs: Upgrade development environment page to use synced tabs.
docs: Convert .html#fragment links to .md#fragment.
docs: Format Markdown with Prettier.
docs: Add "Reading history" section to Git guide.
docs: Fix stale links for how to rebase a PR.
docs: Improve xrefs to screenshot guidance, tools.
docs: Display `main` branch name as inline code.
docs: Update the stale links in "Set up Git" docs.
docs: Fix many spelling mistakes.
docs: Update some broken links.
docs: Clean redundant relative links.
documentation: Modify cases of "[a-zA-Z] e\.g\.," for readability.