Add document links and completions for @source

Author: thecrypticace

packages/tailwindcss-language-service/src/completionProvider.ts

@@ -1537,7 +1537,7 @@ async function provideFileDirectiveCompletions(
   }
 
   let pattern = state.v4
-    ? /@(config|plugin)\s*(?<partial>'[^']*|"[^"]*)$/
+    ? /@(config|plugin|source)\s*(?<partial>'[^']*|"[^"]*)$/
     : /@config\s*(?<partial>'[^']*|"[^"]*)$/
 
   let text = document.getText({ start: { line: position.line, character: 0 }, end: position })

packages/tailwindcss-language-service/src/documentLinksProvider.ts

@@ -20,6 +20,7 @@ export function getDocumentLinks(
   if (state.v4) {
     patterns.push(
       /@plugin\s*(?<path>'[^']+'|"[^"]+")/g,
+      /@source\s*(?<path>'[^']+'|"[^"]+")/g,
     )
   }