fix: suppress harmless esbuild warnings from bundled plugin deps

Add logOverride to the main esbuild build context to silence three
warning types that originate from upstream third-party code bundled
inside plugin dist files:
- direct-eval: gray-matter's JS frontmatter engine in note-properties
- equals-negative-zero: webidl-conversions in citations
- duplicate-object-key: BibTeX month mapping in citations

quartz/cli/handlers.js

@@ -341,6 +341,11 @@ export async function handleBuild(argv) {
     metafile: true,
     sourcemap: true,
     sourcesContent: false,
+    logOverride: {
+      "direct-eval": "silent",
+      "equals-negative-zero": "silent",
+      "duplicate-object-key": "silent",
+    },
     plugins: [
       sassPlugin({
         type: "css-text",