chore: release v5.3.0

[github-actions]

🤖 New release

• kiddo: 5.2.1 -> 5.3.0 (✓ API compatible changes)

Changelog

[5.3.0] - 2026-02-08

Ci

• Update CI workflow triggers to include PR and workflow_dispatch
• Permit coverage to run for PRs as well
• Fix release-plz and add commitlint

Deps

• Remove doc-comment dependency and use doc attribute that was added in Rust 1.54 instead
• Bump cmov to 0.4 as all other versions were yanked

♻️ Refactor

• Remove within_unsorted_iter_owned in favour of modifying within_unsorted_iter

✨ Features

• Improve the flexibility of T type, KdTree.size. Add generate nearest_one_point

🐛 Bug Fixes

• Remove needless SubAssign trait bound from Content trait
• Broken during rebase of earlier trait change commit
• Update to use transform function
• Correct slice access in remainder processing and remove unsafe, Signed-off-by:Markus Zoppelt markus.zoppelt@helsing.ai
• Use try_from() with error for leaf_items.len()

💄 Styling

• Remove unnecessary parentheses
• Fix formatting

📝 Documentation

• Update changelog

🧪 Testing

• Fix broken test of custom struct as T. Add test for () as T
• Add regression test for remainder slice access bug, Signed-off-by:Markus Zoppelt markus.zoppelt@helsing.ai

🧹 Chore

• Fix some lint issues
• Use doc attribute instead of doc_comment!
• Update actions/checkout action to v6
• Update codspeedhq/action action to v4
• Update ad-m/github-push-action action to v1
• Update rust crate rstest to 0.26
• Update rust crate codspeed-criterion-compat to v4
• Update actions/cache action to v5

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This PR was generated with release-plz.