feat(voyage)!: marketplace handoff — rename plugins/ultraplan-local to plugins/voyage [skip-docs]

Session 5 of voyage-rebrand (V6). Operator-authorized cross-plugin scope.

- git mv plugins/ultraplan-local plugins/voyage (rename detected, history preserved)
- .claude-plugin/marketplace.json: voyage entry replaces ultraplan-local
- CLAUDE.md: voyage row in plugin list, voyage in design-system consumer list
- README.md: bulk rename ultra*-local commands -> trek* commands; ultraplan-local refs -> voyage; type discriminators (type: trekbrief/trekreview); session-title pattern (voyage:<command>:<slug>); v4.0.0 release-note paragraph
- plugins/voyage/.claude-plugin/plugin.json: homepage/repository URLs point to monorepo voyage path
- plugins/voyage/verify.sh: drop URL whitelist exception (no longer needed)

Closes voyage-rebrand. bash plugins/voyage/verify.sh PASS 7/7. npm test 361/361.

plugins/ultraplan-local/tests/lib/gates-flag-coverage.test.mjs

@@ -1,48 +0,0 @@
-// tests/lib/gates-flag-coverage.test.mjs
-// Step 11 (plan-v2) — pin that all four pipeline commands document the
-// --gates autonomy-control flag and consume the autonomy-gate state
-// machine via the lib/util/autonomy-gate.mjs CLI shim.
-
-import { test } from 'node:test';
-import { strict as assert } from 'node:assert';
-import { readFileSync } from 'node:fs';
-import { dirname, join } from 'node:path';
-import { fileURLToPath } from 'node:url';
-
-const HERE = dirname(fileURLToPath(import.meta.url));
-const ROOT = join(HERE, '..', '..');
-
-function read(rel) { return readFileSync(join(ROOT, rel), 'utf-8'); }
-
-const COMMANDS = [
-  'commands/trekbrief.md',
-  'commands/trekresearch.md',
-  'commands/trekplan.md',
-  'commands/trekexecute.md',
-];
-
-for (const cmdPath of COMMANDS) {
-  test(`${cmdPath} documents the --gates flag`, () => {
-    const text = read(cmdPath);
-    assert.ok(
-      text.includes('--gates'),
-      `${cmdPath} should document the --gates autonomy-control flag (Step 11)`,
-    );
-  });
-
-  test(`${cmdPath} wires the autonomy-gate.mjs CLI shim`, () => {
-    const text = read(cmdPath);
-    assert.ok(
-      text.includes('autonomy-gate.mjs'),
-      `${cmdPath} should reference lib/util/autonomy-gate.mjs as the state-machine implementation`,
-    );
-  });
-}
-
-test('commands/trekexecute.md mentions MAIN_MERGE_GATE', () => {
-  const text = read('commands/trekexecute.md');
-  assert.ok(
-    text.includes('MAIN_MERGE_GATE'),
-    'commands/trekexecute.md should name MAIN_MERGE_GATE — the only boundary that always pauses regardless of --gates',
-  );
-});