Optimize CI workflow for efficiency

[Copilot]

Repository analysis for slow/inefficient code patterns. Primary optimization target was the GitHub Actions CI workflow.

CI Workflow Improvements

• Concurrency control: Cancel in-progress runs on new commits to same branch/PR
• Job timeout: 10-minute limit prevents runaway jobs
• Shallow checkout: fetch-depth: 1 reduces clone time

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  build:
    timeout-minutes: 10
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 1

Documentation

Updated README with performance considerations and notes on VS Code config portability issues.

Original prompt

Identify and suggest improvements to slow or inefficient code

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💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.