Refresh the homepage and improve export and draft guidance

scripts/java-build.mjs

@@ -4,7 +4,8 @@ import { mkdir, copyFile } from "node:fs/promises";
 const windows = process.platform === "win32";
 const command = windows ? "gradlew.bat" : "sh";
 const targets = process.argv.slice(2);
-if (!targets.length) targets.push(":plugin:build", ":fabric:build");
+if (!targets.some((target) => !target.startsWith("-")))
+  targets.unshift(":plugin:build", ":fabric:build");
 await new Promise((resolve, reject) => {
   const child = spawn(command, windows ? targets : ["./gradlew", ...targets], {
     cwd: "minecraft",