compiler(rime_deployer): include new compiler, use it for '*.custom.yaml' files (#14460)

Signed-off-by: Wu, Zhenyu <wuzhenyu@ustc.edu>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/ftplugin/yaml.vim

@@ -16,6 +16,13 @@ let b:undo_ftplugin = "setl com< cms< et< fo<"
 setlocal comments=:# commentstring=#\ %s expandtab
 setlocal formatoptions-=t formatoptions+=croql
 
+" rime input method engine uses `*.custom.yaml` as its config files
+if expand('%:r:e') ==# 'custom'
+  compiler rime_deployer
+  setlocal include=__include:\\s*
+  let b:undo_ftplugin ..= " inc<"
+endif
+
 if !exists("g:yaml_recommended_style") || g:yaml_recommended_style != 0
   let b:undo_ftplugin ..= " sw< sts<"
   setlocal shiftwidth=2 softtabstop=2