ci: fix patched-JAR workflow + stdio-smoke test path

Three failures from the first CI run on the patched-JAR pipeline
plus a stale path fix that should have ridden along originally:

* NFRT requires `--dist <client|server|joined>` on the `run`
  subcommand; add `--dist joined` so all three NeoForge matrix
  jobs can produce a merged client+server patched JAR.

* The Forge fixture's `settings.gradle` declared `rootProject.name`
  before the `pluginManagement {}` block, which Gradle rejects with
  "pluginManagement must appear before any other statements."
  Reorder so plugin management resolves first.

* `__tests__/manual/mcp/stdio-server-smoke.test.ts` imported
  helpers from `../helpers/` and `../test-constants.js`, but those
  files live one directory higher (`__tests__/helpers/` and
  `__tests__/test-constants.ts`). Fix the relative paths so the
  smoke test can actually load.

Author: GhostTypes

.github/workflows/patched-jars.yml

@@ -91,6 +91,7 @@ jobs:
           OUT="$(pwd)/nfrt-out/${{ matrix.name }}.jar"
           if [ ! -f "$OUT" ]; then
             java -jar tools/nfrt.jar run \
+              --dist joined \
               --neoforge "net.neoforged:neoforge:${{ matrix.neoforge }}:userdev" \
               --write-result "compiledWithNeoForge:$OUT"
           fi

__tests__/fixtures/forge-1.20.1/settings.gradle

@@ -1,8 +1,8 @@
-rootProject.name = 'mc-dev-mcp-forge-fixture'
-
 pluginManagement {
     repositories {
         gradlePluginPortal()
         maven { url = 'https://maven.minecraftforge.net/' }
     }
 }
+
+rootProject.name = 'mc-dev-mcp-forge-fixture'

__tests__/manual/mcp/stdio-server-smoke.test.ts

@@ -1,6 +1,6 @@
 import { afterAll, beforeAll, describe, expect, it } from 'vitest';
-import { type McpTestSession, createMcpSession, extractFirstText } from '../helpers/mcp-stdio.js';
-import { TEST_MAPPING, TEST_VERSION, UNOBFUSCATED_TEST_VERSION } from '../test-constants.js';
+import { type McpTestSession, createMcpSession, extractFirstText } from '../../helpers/mcp-stdio.js';
+import { TEST_MAPPING, TEST_VERSION, UNOBFUSCATED_TEST_VERSION } from '../../test-constants.js';
 
 /**
  * True MCP transport E2E tests.