docs: Move battery sensing hardware integration to new page
docs: Refactor lighting hardware integrations to new category
docs: Link to pin control page from lighting pages
docs: Consolidate lighting feature pages
docs: Remove incorrect redirect
docs: Consolidate lighting config pages
Split the toolchain setup into separate docker and native pages
and improve instructions to better refer to Zephyr docs in certain steps.
Also refactor to improve consistency and add virtualenv instructions.
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Co-authored-by: KemoNine <mcrosson@kemonine.info>
Co-authored-by: Cem Aksoylar <caksoylar@users.noreply.github.com>
