chore: crates.io metadata and README accuracy fixes

[27Bslash6]

Summary

• Add readme, homepage, keywords, categories to both crate Cargo.tomls
• Fix encryption docs: ring on native, aes-gcm on wasm32 (via cachekit-core)
• Update dependency version references from 0.0.1-alpha.1 to 0.2
• Add Redis backend usage example with explicit connect() call
• Add cachekit-macros/README.md pointing to main crate docs
• Improve architecture tree with accurate module descriptions

Test plan

• cargo publish -p cachekit-macros --dry-run — packages cleanly (7 files, 11.8KB)
• cargo clippy -- -D warnings — clean
• All 105 tests passing
• cargo publish -p cachekit-rs --dry-run — expected failure (cachekit-macros not on crates.io yet; handled by sequential publish in release workflow)

Summary by CodeRabbit

• Documentation

  • Updated documentation for version 0.2, including revised feature examples and backend capabilities.
  • Enhanced environment variable guidance with security constraints.
  • Added Redis cluster support documentation.
  • Improved encryption and security documentation with cross-SDK compatibility notes.
  • Added new documentation for the cachekit-macros crate with usage examples.

• Chores

  • Updated package metadata across crates for improved discoverability.

[coderabbitai]

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Free

Run ID: a790ba3b-2aa2-479b-821c-96b6d19663db

📥 Commits

Reviewing files that changed from the base of the PR and between 73ea826 and 8fd4791.

📒 Files selected for processing (4)

• README.md
• crates/cachekit-macros/Cargo.toml
• crates/cachekit-macros/README.md
• crates/cachekit/Cargo.toml

---

📝 Walkthrough

Walkthrough

The PR updates documentation and metadata across the cachekit-rs project. Root README reflects version 0.2 with updated examples, expanded backend capabilities, Redis cluster support, and strengthened security guidance. New proc-macro README and enhanced Cargo metadata improve project visibility and discoverability.

Changes

Cohort / File(s)	Summary
Documentation Updates README.md, crates/cachekit-macros/README.md	Root README updated to version 0.2 with revised examples, expanded backend capabilities (Redis cluster support), and strengthened environment variable security guidance. New proc-macro README added with usage examples and feature configuration.
Cargo Metadata crates/cachekit-macros/Cargo.toml, crates/cachekit/Cargo.toml	Extended package metadata with readme, homepage, keywords, and categories fields for improved crate discoverability and documentation linking.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Poem

🐰 A hop through the docs, now shiny and bright!
Version 0.2 dances into the light,
Metadata gleams, examples run clear,
Redis clusters and guards standing near,
Our cachekit-rs struts with all of its might! ✨

---

Note

🎁 Summarized by CodeRabbit Free

Your organization is on the Free plan. CodeRabbit will generate a high-level summary and a walkthrough for each pull request. For a comprehensive line-by-line review, please upgrade your subscription to CodeRabbit Pro by visiting https://app.coderabbit.ai/login.

_{Comment @coderabbitai help to get the list of available commands and usage tips.}