Register the IPAM CLI plugin

[scotwells]

What this delivers

Registers the IPAM plugin (milo-ipam) in the Milo CLI plugin catalog, so anyone can install it through the datumctl plugin marketplace:

datumctl plugin index add milo-os milo-os/cli-plugins
datumctl plugin install ipam
datumctl ipam pool list

IPAM lets teams manage their IP address space — provision pools and claim prefixes — and this puts that experience one command away, for every OS and architecture.

Changes

• plugins/ipam.yaml — the IPAM plugin manifest at v0.2.0, across linux/darwin/windows on amd64/arm64, using the portable milo-<name> binary convention.
• index.yaml — regenerated to include the entry (the file datumctl actually reads).
• README.md — lists ipam under available plugins.

Backed by a real release

The entry points at the milo-os/ipam v0.2.0 release assets, and every sha256 is taken from that release's checksums.txt and verified against the published archives. Catalog CI (schema + URL resolution + checksum verification) should pass.

Related work

• Release tooling that publishes these assets: Make the IPAM CLI plugin installable via datumctl ipam#65
• Automates future version bumps to this entry: Update cli-plugins catalog on release; fix goreleaser double-run ipam#66 + Add update-plugin-index reusable workflow datum-cloud/actions#84
• Sibling catalog change — inventory moved into this catalog: Add inventory plugin to the catalog #2
• Backing release: milo-os/ipam v0.2.0
• datumctl plugin marketplace: Open the datumctl plugin marketplace to third-party catalogs datum-cloud/datumctl#224 (design: Third-party plugin indexes & marketplaces for datumctl datum-cloud/enhancements#783)