support loglevel filter in playground (#3569)

support loglevel filter in playground to avoid too many verbose log as
well as user can filter logs as needed.

fixes #3554

.chronus/changes/playground-log-2024-5-12-13-33-41.md

@@ -0,0 +1,7 @@
+---
+changeKind: feature
+packages:
+  - "@typespec/playground"
+---
+
+Support loglevel in playground's logging

packages/playground/src/services.ts

@@ -55,8 +55,31 @@ export async function registerMonacoLanguage(host: BrowserHost) {
       return model ? textDocumentForModel(model) : undefined;
     },
     sendDiagnostics() {},
-    // eslint-disable-next-line no-console
-    log: console.log,
+    log: (log) => {
+      switch (log.level) {
+        case "error":
+          // eslint-disable-next-line no-console
+          console.error(log);
+          break;
+        case "warning":
+          // eslint-disable-next-line no-console
+          console.warn(log);
+          break;
+        case "info":
+          // eslint-disable-next-line no-console
+          console.info(log);
+          break;
+        case "debug":
+          // corresponding to Verbose LogLevel in Edge/Chrome which is off by default
+          // eslint-disable-next-line no-console
+          console.debug(log);
+          break;
+        case "trace":
+        default:
+          // just skip traces in playground
+          break;
+      }
+    },
     applyEdit(param) {
       return Promise.resolve({ applied: false });
     },