chore(release): prepare for v0.8.0

[kalwalt]

Summary

Release-prep for v0.8.0. This is a minor version bump (0.7.1 → 0.8.0) since it adds
a whole new feature area (the histogram/CLAHE module — calc_hist,
calc_back_project, compare_hist, equalize_hist, Clahe, with parallel + SIMD
support and WASM bindings) with no breaking changes to previously-released APIs,
matching this project's own precedent (0.6 → 0.7.0 was the last feature-sized bump;
0.7.0 → 0.7.1 was CI/Miri-only).

• Bump version in Cargo.toml ([package] + [workspace.package]) and root
  package.json. crates/wasm/Cargo.toml inherits via version.workspace = true.
• Regenerate crates/wasm/pkg/package.json via npm run build.
• Fix README.md's hardcoded install-snippet version strings (still said "0.6" in
  five places — these don't update automatically with the version bump).
• Add a note to MAINTAINERS.md's release checklist so this doesn't drift again.
• Generate the v0.8.0 CHANGELOG.md entry via git-cliff.

Note: this PR targets dev, not main. Per CLAUDE.md's release process, the
actual release PR is a separate dev → main PR opened once this lands — its head
must literally be dev (not a side branch) to avoid the SHA-divergence issue that
hit v0.7.1/#95.

Test plan

• cargo build --workspace clean with the new version.
• cargo test --workspace: 342 lib tests + 40 doc-tests passing.
• npm run build (wasm dual build) succeeds, crates/wasm/pkg/package.json
  shows "version": "0.8.0".

🤖 Generated with Claude Code

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PR Summary by Qodo

Prepare PureCV v0.8.0 release metadata and documentation

⚙️ Configuration changes 📝 Documentation 🕐 10-20 Minutes

AI Description

• Bump Rust, npm, and generated WASM package metadata to v0.8.0.
• Add the v0.8.0 release history covering histogram and CLAHE functionality.
• Refresh installation examples and document checks preventing future version drift.

Diagram

graph TD
  M["Maintainer guide"] --> R["Release metadata"] --> C["WASM crate"] --> B["WASM build"] --> P["WASM package"]
  R --> D["Install docs"]
  H["Git history"] --> L["Changelog"]
  M --> D

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High-Level Assessment

The following are alternative approaches to this PR:

1. Automate release preparation

• ➕ Synchronizes Cargo, npm, generated WASM, and documentation versions consistently
• ➕ Reduces manual omissions in installation snippets
• ➕ Can validate stale versions before opening a release PR
• ➖ Requires new release tooling and maintenance
• ➖ Generated changelog entries still need human review
• ➖ Introducing automation during release preparation adds avoidable release risk

Recommendation: The current approach follows the repository's documented release process and is appropriate for v0.8.0. Merge this focused preparation as-is, then consider a separate release script or CI consistency check to prevent metadata and README versions from drifting in future releases.

Files changed (6) +56 / -10

Documentation (3) +52 / -6

CHANGELOG.mdAdd the v0.8.0 release notes +42/-0

Add the v0.8.0 release notes

• Adds the dated v0.8.0 changelog entry generated from conventional commits. It summarizes histogram and CLAHE features, WASM bindings, SIMD and parallel work, fixes, tests, refactoring, and documentation.

CHANGELOG.md

MAINTAINERS.mdExpand the release version checklist +5/-1

Expand the release version checklist

• Adds the root npm manifest to the required version-bump locations. It also instructs maintainers to search Rust and WASM README installation snippets for stale hardcoded versions.

MAINTAINERS.md

README.mdUpdate Rust installation examples to version 0.8 +5/-5

Update Rust installation examples to version 0.8

• Replaces stale 0.6 dependency versions with 0.8 across standard, no-std, ndarray, parallel, and SIMD installation examples.

README.md

Other (3) +4 / -4

Cargo.tomlBump crate and workspace versions to 0.8.0 +2/-2

Bump crate and workspace versions to 0.8.0

• Changes both the root package version and shared workspace package version from 0.7.1 to 0.8.0. Workspace members such as the WASM crate inherit the new version.

Cargo.toml

package.jsonRegenerate WASM package metadata for v0.8.0 +1/-1

Regenerate WASM package metadata for v0.8.0

• Updates the generated publishable WASM npm package version from 0.7.1 to 0.8.0 after rebuilding the package.

crates/wasm/pkg/package.json

package.jsonBump root npm metadata to v0.8.0 +1/-1

Bump root npm metadata to v0.8.0

• Updates the private root package version from 0.7.1 to 0.8.0, aligning npm build and publishing metadata with the Rust workspace.

package.json