adds forge support, fixes some critical errors

serverConfigs/start.ts

@@ -0,0 +1,36 @@
+import { Loader } from "../types/mcgrizzconf.ts";
+
+export const getServerStartCommands = (
+  loader: Loader,
+  instance = "server",
+): Deno.Command => {
+  switch (loader) {
+    case "forge":
+      return new Deno.Command(
+        Deno.build.os === "windows" ? "./run.bat" : "./run.sh",
+        // "pwd",
+        {
+          args: [
+            "nogui",
+          ],
+          stdin: "piped",
+          stdout: "piped",
+          cwd: "./" + instance,
+        },
+      );
+    case "vanilla":
+    case "unset":
+    case "fabric":
+      return new Deno.Command("java", {
+        args: [
+          "-Xmx8G",
+          "-jar",
+          "./server.jar",
+          "nogui",
+        ],
+        cwd: "./" + instance,
+        stdin: "piped",
+        stdout: "piped",
+      });
+  }
+};