Add Prompt Rules and Model Router plugins

[Z-M-Huang]

What

Register two native CLIProxyAPI plugins:

• Prompt Rules injects or strips system and user prompt text before provider translation, with model and protocol scoping.
• Model Router adds logical model aliases with priority or round-robin selection, cooldowns, and failover across CPA model targets.

Both v0.2.1 releases register dedicated configuration pages in CPA's Plugins frontend, with typed editors and parser-backed validation. The pages reuse CPAMC's persisted authenticated session, load automatically, and follow CPAMC's selected light, white, or dark theme; a key fallback appears only when no usable key is persisted.

This PR changes only registry.json and omits the legacy version field so CPA resolves the latest published release.

Release evidence

Prompt Rules

• Repository: https://github.com/markhuangai/cpa-plugin-prompt-rules
• Latest release: v0.2.1
• Successful release workflow: https://github.com/markhuangai/cpa-plugin-prompt-rules/actions/runs/31275342871
• Assets:
  • checksums.txt
  • prompt-rules_0.2.0_darwin_amd64.zip
  • prompt-rules_0.2.0_darwin_arm64.zip
  • prompt-rules_0.2.0_linux_amd64.zip
  • prompt-rules_0.2.0_linux_arm64.zip
  • prompt-rules_0.2.0_windows_amd64.zip

Model Router

• Repository: https://github.com/markhuangai/cpa-plugin-model-router
• Latest release: v0.2.1
• Successful release workflow: https://github.com/markhuangai/cpa-plugin-model-router/actions/runs/31275485841
• Assets:
  • checksums.txt
  • model-router_0.2.0_darwin_amd64.zip
  • model-router_0.2.0_darwin_arm64.zip
  • model-router_0.2.0_linux_amd64.zip
  • model-router_0.2.0_linux_arm64.zip
  • model-router_0.2.0_windows_amd64.zip

Both releases are public, non-draft, and non-prerelease. I verified that each checksum manifest has one SHA-256 entry per archive, each downloaded archive matches its checksum, and each zip contains exactly one correctly named dynamic library at its root.

Validation

• jq empty registry.json
• Registry schema, required-field, ID-format, repository-format, uniqueness, and version-fallback checks
• go test ./internal/pluginstore in router-for-me/CLIProxyAPI
• Native CPA host integration tests for both plugins
• Published Linux binary checks for the embedded CPAMC session/theme dashboard and 0.2.1 metadata
• Live GitHub release asset-set, zip-layout, and checksum-manifest checks for both v0.2.1 releases