feat(tera2): upgrade to Zola 0.23, Tera 2, and parallelize build pipelines

[kascit]

Overview

• Zola 0.23.4 & Tera 2.0 Full Migration:

  • Converted all 14 page and layout templates to Tera 2 components.
  • Converted all 31 shortcodes in templates/shortcodes/ to {% component ... %}.
  • Migrated shortcode calls across Markdown content to JSX syntax ({{ <component_name ... /> }}).
  • Updated taxonomy templates to use Zola 0.23 taxonomy object fields.
  • Handled optional struct arguments with ...rest.

• Multithreading & Concurrency Optimizations:

  • scripts/optimize-static-assets.js: Async worker pool scaling with os.cpus().length, smart filtering of already-optimized responsive variants.
  • scripts/generate-responsive-images.js: Parallel ImageMagick conversions across CPU cores.
  • scripts/generate-icons.js: Parallel icon rendering across CPU cores.
  • scripts/minify-js.js: Parallel Terser minification workers.

• Cross-Platform & Multi-Architecture Build Support:

  • Dynamic OS and CPU architecture binary resolution in .github/actions/setup-build-env/action.yml.
  • Fixed Node DEP0190 child process deprecation warnings by passing shell: process.platform === 'win32'.
  • Cleaned and consolidated shared path utilities across all scripts.

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