Problem: documentation was spread across four files (README.md,
doc/oil.txt, doc/api.md, doc/recipes.md) with duplication and gaps.
User events were undocumented, and adapter docs only lived in the
README.
Solution: expand doc/oil.txt with five new sections (introduction,
requirements, adapters, recipes, events) from existing content. Trim
README to a landing page pointing to :help oil. Delete doc/api.md
and doc/recipes.md since their content now lives in the helpdoc.
Closes: barrettruth/oil.nvim#6
Barrett Ruth
7ca157fed3
