Add powershell support

.gitmodules

@@ -98,3 +98,6 @@
 [submodule "pack/vendor/start/docker-compose.vim"]
 	path = pack/vendor/start/docker-compose.vim
 	url = https://github.com/skanehira/docker-compose.vim
+[submodule "pack/vendor/start/vim-powershell.git"]
+	path = pack/vendor/start/vim-powershell.git
+	url = https://github.com/corbob/vim-powershell.git

config/before/ale.vim

@@ -26,6 +26,7 @@ let g:ale_linters = {
 \   'sql': ['sql-lint'],
 \   'promql': ['promql-langserver'],
 \   'java': ['javalsp'],
+\   'ps1': ['powershell'],
 \}
 
 let g:ale_fixers = {

pack/vendor/start/vim-powershell.git

@@ -0,0 +1 @@
+Subproject commit 37fb044c8398018f5b900a05a39824dba7477575