Consolidate the deferred features and intentional divergences from the
parity log (development/vimwiki-gap.md) into a user-facing reference:
- Deferred: the markdown generated-content cluster
(markdown heading generation, markdown_header_style, markdown_link_ext)
- By-design divergences grouped by area (highlighting/conceal -> LSP,
syntax detection, config mechanism, auto_tags, mouse maps, list_margin
negative + diary_caption_level -1 value semantics, Vim/Win shims)
- Default-location differences (html_path/template_path/diary_rel_path)
- Notes on the vars.vim compat shim and additive commands
Link it from the README "Migrating from vimwiki" section so it's
discoverable.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
