Add the crate dependency graph visualization to the contributor guide (#3907)

* Add the crate dependency graph visualization to the contributor guide

* Code review fixes

* And more

website/.build-scripts/generate-crate-hierarchy.ts

@@ -0,0 +1,19 @@
+/* eslint-disable no-console */
+
+import fs from "fs";
+
+import { instance } from "@viz-js/viz";
+
+const [inputFile, outputFile] = process.argv.slice(2);
+if (!inputFile || !outputFile) {
+	console.error("Usage: node generate-crate-hierarchy.ts <input.dot> <output.svg>");
+	process.exit(1);
+}
+
+const dot = fs.readFileSync(inputFile, "utf-8");
+
+const viz = await instance();
+const svg = viz.renderString(dot, { format: "svg" });
+
+fs.writeFileSync(outputFile, svg);
+console.log(`SVG output written to: ${outputFile}`);