Move push_repo_memory script from inline to require action mode

[Copilot]

The push_repo_memory step was inlining ~200 lines of JavaScript in every compiled workflow lock file. This change moves it to use the require pattern like other scripts in the codebase.

Changes

• pkg/workflow/repo_memory.go: Modified buildPushRepoMemoryJob() to use require('/tmp/gh-aw/actions/push_repo_memory.cjs') when setup action is available, falling back to inline script otherwise
• pkg/workflow/repo_memory_integration_test.go: Updated test to verify require statement presence instead of checking for inline validation messages
• 17 workflow lock files: Reduced from inline script to require pattern

Before/After

Before (~200 lines per workflow):

with:
  script: |
    const fs = require("fs");
    const path = require("path");
    const { execSync } = require("child_process");
    async function main() {
      // ... 200+ lines of validation and git logic
    }
    module.exports = { main };

After (7 lines):

with:
  script: |
    global.core = core;
    global.github = github;
    global.context = context;
    global.exec = exec;
    global.io = io;
    const { main } = require('/tmp/gh-aw/actions/push_repo_memory.cjs');
    await main();

The JavaScript file at actions/setup/js/push_repo_memory.cjs was already present and unchanged.

Net impact: -1,899 lines across all lock files

Original prompt

Reference: https://github.com/githubnext/gh-aw/actions/runs/20485924806/job/58868843921#step:7:1

Move JavaScript file to actions/setup and use require action mode in step.

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