vim-patch:9.2.0327: filetype: uv scripts are not detected (#38920)

Problem:  filetype: uv scripts are not detected
          (Asger Hautop Drewsen)
Solution: Detect uv scripts as python filetype if the shebang line
          contains "uv run"

Reference:
https://docs.astral.sh/uv/guides/scripts/#using-a-shebang-to-create-an-executable-file

fixes: vim/vim#19941

6c16ccaf61

Co-authored-by: Christian Brabandt <cb@256bit.org>

runtime/lua/vim/filetype/detect.lua

@@ -2162,6 +2162,10 @@ local function match_from_hashbang(contents, path, dispatch_extension)
     end
   end
 
+  if name == 'uv' and matchregex(first_line, [[\<uv run\>]]) then
+    return 'python'
+  end
+
   -- If nothing matched, check the extension table. For a hashbang like
   -- '#!/bin/env foo', this will set the filetype to 'fooscript' assuming
   -- the filetype for the 'foo' extension is 'fooscript' in the extension table.