Problem: filetype: hlsl files are not recognized
Solution: Detect *.hlsl files hlsl filetype, include
ftplugin, indent and syntax plugins, update
gvim menu (Maxim Kim)
Note to Neovim devs: runtime files are in vim9script
closes: #20993
Signed-off-by: Maxim Kim <habamax@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
