feat(treesitter): add :InspectTree command (#22477)

runtime/doc/news.txt

@@ -89,8 +89,9 @@ The following new APIs or features were added.
 
   See |lsp-semantic_tokens| for more information.
 
-• |vim.treesitter.inspect_tree()| opens a split window showing a text
-  representation of the nodes in a language tree for the current buffer.
+• |vim.treesitter.inspect_tree()| and |:InspectTree| opens a split window
+  showing a text representation of the nodes in a language tree for the current
+  buffer.
 
 • Added support for the `willSave` and `willSaveWaitUntil` capabilities to the
   LSP client. `willSaveWaitUntil` allows a server to modify a document before it

runtime/doc/treesitter.txt

@@ -603,6 +603,8 @@ inspect_tree({opts})                           *vim.treesitter.inspect_tree()*
     to toggle the display of the source language of each node, and press
     <Enter> to jump to the node under the cursor in the source buffer.
 
+    Can also be shown with `:InspectTree`.                      *:InspectTree*
+
     Parameters: ~
       • {opts}  (table|nil) Optional options table with the following possible
                 keys:

runtime/lua/vim/treesitter.lua

@@ -424,6 +424,8 @@ end
 --- display of the source language of each node, and press <Enter> to jump to the node under the
 --- cursor in the source buffer.
 ---
+--- Can also be shown with `:InspectTree`. *:InspectTree*
+---
 ---@param opts table|nil Optional options table with the following possible keys:
 ---                      - lang (string|nil): The language of the source buffer. If omitted, the
 ---                        filetype of the source buffer is used.

runtime/plugin/nvim.lua

@@ -5,3 +5,7 @@ vim.api.nvim_create_user_command('Inspect', function(cmd)
     vim.show_pos()
   end
 end, { desc = 'Inspect highlights and extmarks at the cursor', bang = true })
+
+vim.api.nvim_create_user_command('InspectTree', function()
+  vim.treesitter.inspect_tree()
+end, { desc = 'Inspect treesitter language tree for buffer' })