feat: add the entire plugin

doc/fugitive-ts.nvim.txt

@@ -0,0 +1,69 @@
+*fugitive-ts.nvim.txt*        Treesitter highlighting for vim-fugitive diffs
+
+Author:  Barrett Ruth <br.barrettruth@gmail.com>
+License: MIT
+
+==============================================================================
+INTRODUCTION                                                   *fugitive-ts.nvim*
+
+fugitive-ts.nvim adds treesitter-based syntax highlighting to vim-fugitive
+diff views. It overlays language-aware highlights on top of fugitive's
+default regex-based diff highlighting.
+
+==============================================================================
+REQUIREMENTS                                          *fugitive-ts-requirements*
+
+- Neovim 0.9.0+
+- vim-fugitive
+- Treesitter parsers for languages you want highlighted
+
+==============================================================================
+SETUP                                                        *fugitive-ts-setup*
+
+>lua
+    require('fugitive-ts').setup({
+      -- Enable/disable highlighting (default: true)
+      enabled = true,
+
+      -- Custom filename -> language mappings (optional)
+      languages = {},
+
+      -- Debounce delay in ms (default: 50)
+      debounce_ms = 50,
+    })
+<
+
+==============================================================================
+COMMANDS                                                  *fugitive-ts-commands*
+
+This plugin works automatically when you open a fugitive buffer. No commands
+are required.
+
+==============================================================================
+API                                                            *fugitive-ts-api*
+
+                                                    *fugitive-ts.setup()*
+setup({opts})
+    Configure the plugin. See |fugitive-ts-setup| for options.
+
+                                                   *fugitive-ts.attach()*
+attach({bufnr})
+    Manually attach highlighting to a buffer. Called automatically for
+    fugitive buffers.
+
+                                                  *fugitive-ts.refresh()*
+refresh({bufnr})
+    Manually refresh highlighting for a buffer.
+
+==============================================================================
+ROADMAP                                                    *fugitive-ts-roadmap*
+
+Planned features and improvements:
+
+- Vim syntax fallback: For languages without treesitter parsers, fall back
+  to vim's built-in syntax highlighting via scratch buffers. This would
+  provide highlighting coverage for more languages at the cost of
+  implementation complexity.
+
+==============================================================================
+ vim:tw=78:ts=8:ft=help:norl: