feat: Add Deno lsp support

ale_linters/typescript/deno.vim

@@ -0,0 +1,25 @@
+" Author: Mohammed Chelouti - https://github.com/motato1
+" Description: Deno lsp linter for TypeScript files.
+
+call ale#linter#Define('typescript', {
+\   'name': 'deno',
+\   'lsp': 'stdio',
+\   'executable': function('ale#handlers#deno#GetExecutable'),
+\   'command': '%e lsp',
+\   'project_root': function('ale#handlers#deno#GetProjectRoot'),
+\   'initialization_options': function('ale_linters#typescript#deno#GetInitializationOptions'),
+\})
+
+function! ale_linters#typescript#deno#GetInitializationOptions(buffer) abort
+    let l:options = {
+    \   'enable': v:true,
+    \   'lint': v:true,
+    \   'unstable': v:false,
+    \   }
+
+    if ale#Var(a:buffer, 'deno_unstable')
+        let l:options.unstable = v:true
+    endif
+
+    return l:options
+endfunction