feat: use builtin extends query in vim.treesitter.query.set for injections

## Details

With the neovim 0.11.0 release the vim.treesitter.query.set API was
updated to support the `extends` and `inherits` keywords much like
writing query files support but programmatically at runtime.

We can take advantage of this to simplify the logic of updating
`injections`, like we do for the `gitcommit` filetype if configured.

Rather than needing to loop through all the files append them to a
string, then add our injection, we can simply pre-pend the query with
the `;; extends` keyword and call set, no looping & appending needed.

Gate this new logic to only run if the user is on `0.11.0`, keep the old
logic around for the time being, eventually deprecate the previous
approach when we bump the minimum requirement for this plugin

Author: MeanderingProgrammer

lua/render-markdown/core/treesitter.lua

@@ -1,3 +1,5 @@
+local Env = require('render-markdown.lib.env')
+
 ---@type table<string, vim.treesitter.Query>
 local queries = {}
 
@@ -24,12 +26,16 @@ function M.inject(language, injection)
     end
 
     local query = ''
-    local files = vim.treesitter.query.get_files(language, 'injections')
-    for _, file in ipairs(files) do
-        local f = io.open(file, 'r')
-        if f ~= nil then
-            query = query .. f:read('*all') .. '\n'
-            f:close()
+    if Env.has_11 then
+        query = query .. ';; extends' .. '\n'
+    else
+        local files = vim.treesitter.query.get_files(language, 'injections')
+        for _, file in ipairs(files) do
+            local f = io.open(file, 'r')
+            if f ~= nil then
+                query = query .. f:read('*all') .. '\n'
+                f:close()
+            end
         end
     end
     query = query .. injection.query

lua/render-markdown/health.lua

@@ -5,7 +5,7 @@ local state = require('render-markdown.state')
 local M = {}
 
 ---@private
-M.version = '8.1.17'
+M.version = '8.1.18'
 
 function M.check()
     M.start('version')