feat: migrate all scripts and CI tasks to cargo-make

[bug-ops]

Summary

Migrates all build scripts and CI tasks to cargo-make for better maintainability and DRY compliance.

Changes

• Added Makefile.toml - Comprehensive cargo-make configuration with 60+ tasks covering:

  • Development (fmt, clippy, lint, doc)
  • Security (cargo-deny checks)
  • Testing (Rust, Python, Node.js)
  • Coverage (all platforms)
  • Utilities (benchmarks, version checking)
  • CI composite tasks

• Simplified CI workflow - Replaced inline commands with cargo-make tasks in .github/workflows/ci.yml (-131 lines)

• Added check-versions task - New utility for checking outdated dependencies

• Removed redundant scripts - Deleted benchmarks/compare.sh (functionality now in bench-compare task)

• Updated README - Added comprehensive cargo-make usage documentation

Benefits

• DRY Principle - Single source of truth for all tasks
• Local = CI Parity - Developers run exact same commands as CI
• Cross-Platform - Works on Linux, macOS, Windows
• Self-Documenting - cargo make --list-all-steps shows all tasks
• Automatic Tooling - cargo-make installs required tools automatically

Quick Reference

cargo make fmt              # Format code
cargo make clippy           # Lint
cargo make test-rust        # Run tests
cargo make check-versions   # Check dependencies
cargo make bench-compare    # Compare performance
cargo make ci-all           # Run all CI checks locally

Resolves #10

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@           Coverage Diff           @@
##             main      #13   +/-   ##
=======================================
  Coverage   78.80%   78.80%           
=======================================
  Files          27       27           
  Lines        4303     4303           
=======================================
  Hits         3391     3391           
  Misses        912      912           

Flag	Coverage Δ
rust-core	78.80% <ø> (ø)

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