Add latest version column to function catalog documentation

[aravindtga]

Description

This PR adds a "Latest Version" column to the function listing on the catalog documentation site, showing the latest released version for each function with a link to its GitHub release.

Changes

• documentation/layouts/shortcodes/listfunctions.html
  • Fetch latest release tags per function from the GitHub git/matching-refs API
  • Use numeric semver comparison (major.minor.patch) to determine the latest version, avoiding lexicographic ordering bugs with double-digit versions (e.g., v0.10.0 vs v0.9.0)
• Documentation updated

Notes

• The API token is optional. Without it, unauthenticated requests are subject to GitHub's lower rate limits, which may cause version info to be unavailable during builds.
• For Netlify, set KRM_CATALOG_API_TOKEN via the site's environment variables in the Netlify UI.

[netlify]

✅ Deploy Preview for krm-function-catalog ready!

Name	Link
🔨 Latest commit	1a152e6
🔍 Latest deploy log	https://app.netlify.com/projects/krm-function-catalog/deploys/69bd7224820a750008ee44b6
😎 Deploy Preview	https://deploy-preview-1226--krm-function-catalog.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[Copilot]

Pull request overview

Adds a “Latest Version” column to the function catalog table by querying GitHub tags per function at build time and linking the displayed version to the corresponding GitHub release.

Changes:

• Add per-function GitHub API lookups and semver-like selection logic to compute/display latest versions.
• Add Hugo security.funcs.getenv allowlist entry for KRM_CATALOG_API_TOKEN.
• Document how to configure an API token for local/Netlify builds and link docs from CONTRIBUTING.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 8 comments.

File	Description
documentation/layouts/shortcodes/listfunctions.html	Fetches tags from GitHub and renders a new “Latest Version” column with release links
documentation/config.toml	Allows reading KRM_CATALOG_API_TOKEN via Hugo security config
documentation/README.md	Documents optional GitHub token setup to avoid rate limits
CONTRIBUTING.md	Adds pointer to documentation README for running the docs site

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[aravindtga]

This should be rebased once #1227 is merged.