[infra] include css in the logging component bundle

Change-Id: Ia0ded4d3452600c98ec262d40100f0859a1623e6
Reviewed-on: https://fuchsia-review.googlesource.com/c/vscode-plugins/+/778229
Reviewed-by: Solly Ross <sollyross@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
diff --git a/build.mjs b/build.mjs
index 92f0ba5..6192bcc 100644
--- a/build.mjs
+++ b/build.mjs
@@ -80,6 +80,7 @@
   sourcemap: IS_DEV ? 'linked' : '',
   loader: {
     '.ttf': 'file',
+    '.css': 'text',
   },
   minify: !IS_DEV,
   watch: makeWatch("view"),