[codex] Refresh Signaliz Claude plugin resources

[joshwhitfield]

What changed

• Adds a current Signaliz resource map with MCP, CLI, SDK, API, OpenAPI, hosted MCP, and skills links.
• Refreshes Signaliz plugin positioning to include Campaign Builder and Ops.
• Adds current Signaliz public package versions.
• Updates the Signaliz MCP section with current discovery, Campaign Builder, and Ops tool names.
• Updates plugin metadata tags/description for Campaign Builder and Ops discoverability.

Validation

• git diff --check passed
• .claude-plugin/plugin.json parses with jq empty
• Current package versions were verified during the Signaliz GitHub resource refresh