chore: Add workflow to publish to crates.io

[derlerd-dfinity]

This PR adds a workflow to automate publication to crates.io. The workflow will also send a message to the team-dsm-alerts Slack channel.

[derlerd-dfinity]

TODO: Not quite sure yet how to best test this...

[github-actions]

canbench 🏋 (dir: ./examples/fibonacci) be84f9d 2026-01-13 12:02:25 UTC

✅ ./examples/fibonacci/canbench_results.yml is up to date
📦 canbench_results_fibonacci-example.csv available in artifacts

---------------------------------------------------

Summary:
  instructions:
    status:   No significant changes 👍
    counts:   [total 5 | regressed 0 | improved 0 | new 0 | unchanged 5]
    change:   [max 0 | p75 0 | median 0 | p25 0 | min 0]
    change %: [max 0.00% | p75 0.00% | median 0.00% | p25 0.00% | min 0.00%]

  heap_increase:
    status:   No significant changes 👍
    counts:   [total 5 | regressed 0 | improved 0 | new 0 | unchanged 5]
    change:   [max 0 | p75 0 | median 0 | p25 0 | min 0]
    change %: [max 0.00% | p75 0.00% | median 0.00% | p25 0.00% | min 0.00%]

  stable_memory_increase:
    status:   No significant changes 👍
    counts:   [total 5 | regressed 0 | improved 0 | new 0 | unchanged 5]
    change:   [max 0 | p75 0 | median 0 | p25 0 | min 0]
    change %: [max 0.00% | p75 0.00% | median 0.00% | p25 0.00% | min 0.00%]

---------------------------------------------------
CSV results saved to canbench_results.csv

[github-actions]

canbench 🏋 (dir: ./examples/btreemap_vs_hashmap) be84f9d 2026-01-13 12:02:30 UTC

✅ ./examples/btreemap_vs_hashmap/canbench_results.yml is up to date
📦 canbench_results_btreemap-vs-hashmap-example.csv available in artifacts

---------------------------------------------------

Summary:
  instructions:
    status:   No significant changes 👍
    counts:   [total 3 | regressed 0 | improved 0 | new 0 | unchanged 3]
    change:   [max 0 | p75 -318 | median -635 | p25 -4.02K | min -7.41K]
    change %: [max 0.00% | p75 -0.00% | median -0.00% | p25 -0.00% | min -0.00%]

  heap_increase:
    status:   No significant changes 👍
    counts:   [total 3 | regressed 0 | improved 0 | new 0 | unchanged 3]
    change:   [max 0 | p75 0 | median 0 | p25 -1 | min -1]
    change %: [max 0.00% | p75 0.00% | median 0.00% | p25 -0.06% | min -0.11%]

  stable_memory_increase:
    status:   No significant changes 👍
    counts:   [total 3 | regressed 0 | improved 0 | new 0 | unchanged 3]
    change:   [max 0 | p75 0 | median 0 | p25 0 | min 0]
    change %: [max 0.00% | p75 0.00% | median 0.00% | p25 0.00% | min 0.00%]

---------------------------------------------------
CSV results saved to canbench_results.csv