fix: remove ecosystem wrappers and document as vimrc recipes

[jesse23]

Summary

• Remove TabsVim_FzfOpenInTab and TabsVim_FlogInTab from plugin/tabs.vim — these were thin one-liner wrappers that introduced undeclared optional dependencies and caused exists() autoload detection issues with fzf.vim
• Update README.md and all SPECs to document fzf/flog integrations as vimrc recipes (direct calls the user owns)
• g:tabs_vim_tabclose_types remains plugin-side as it provides real autocmd logic

Test plan

• Verify <leader>ft (fzf file picker in tab) works via direct vimrc call
• Verify <leader>gg (flog in tab) works via direct vimrc call
• Verify g:tabs_vim_tabclose_types still wires q → :tabclose correctly
• Confirm plugin loads without errors

[Copilot]

Pull request overview

This PR removes thin “ecosystem wrapper” functions from tabs.vim to avoid optional dependency coupling (and related exists()/autoload detection issues), and updates user-facing documentation/specs to present fzf/flog integrations as vimrc-owned recipes.

Changes:

• Removed TabsVim_FzfOpenInTab() and TabsVim_FlogInTab() from the plugin.
• Updated README and specs to document fzf/flog usage as direct vimrc mappings (no plugin wrappers).
• Kept g:tabs_vim_tabclose_types as the plugin-owned ecosystem feature for q → :tabclose.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
README.md	Removes optional dependency mention and replaces wrapper-based mappings with direct vimrc recipes.
plugin/tabs.vim	Deletes the fzf/flog wrapper functions; retains g:tabs_vim_tabclose_types autocmd logic.
docs/specs/tabs.vim.md	Updates design goal / composition narrative to remove wrapper ownership.
docs/specs/key-binding.md	Removes wrapper API sections and switches recommended wiring to direct calls.
docs/specs/ecosystem-support.md	Reframes “ecosystem support” around documented recipes + plugin-side tabclose wiring.

Comments suppressed due to low confidence (1)

plugin/tabs.vim:103

• The built-in help file (doc/tabs.vim.txt) still documents TabsVim_FzfOpenInTab()/TabsVim_FlogInTab() and lists fzf.vim/vim-flog as optional requirements, but these wrappers were removed here. Please update the help docs (and any generated help tags) to avoid advertising non-existent public APIs.

"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" ECOSYSTEM
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""

" g:tabs_vim_tabclose_types: wire q → :tabclose for specified buffer types.
" Must be set before the plugin loads. Supported tokens: 'floggraph', 'git',
" 'diff', or any FileType name matching ^\h\w*$.
if exists('g:tabs_vim_tabclose_types')

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