feat: per-host azure.yaml schemas and service targets for Foundry AI resources

[huimiu]

Summary

Adds per-host JSON schemas, service-level config writing, and full azd deploy support for five Foundry AI resource hosts in azure.yaml: azure.ai.project, azure.ai.connection, azure.ai.toolbox, azure.ai.skill, and azure.ai.routine.

What changed

Per-host schemas

Each Foundry resource host now has its own JSON schema (azure.ai.project.json, azure.ai.connection.json, azure.ai.toolbox.json, azure.ai.skill.json, azure.ai.routine.json) describing the properties that can appear inline on the service in azure.yaml. Both schemas/v1.0/azure.yaml.json and schemas/alpha/azure.yaml.json have five new if/then conditionals — one per host — that compose these schemas into the core azure.yaml shape. Each Foundry host conditional also disables the config, project, runtime, docker, and image fields, which do not apply to AI resources.

Service-level config writing (azure.ai.agents)

resource_services.go now writes project, connection, and toolbox entries using AdditionalProperties (service-level inline) instead of the nested config: block. Readers prefer AdditionalProperties and fall back to Config for files written by earlier versions.

azure.ai.skill service target

azure.ai.skills now registers a service target provider. azd deploy reads instructions, description, and allowed_tools from the service entry and calls CreateVersionInline, setting that version as the default. The skill name is taken from the azure.yaml service name.

azure.ai.routine service target

azure.ai.routines now registers a service target provider. azd deploy binds the service-level properties directly to the routine API model (triggers, actions, tools, description) and calls PutRoutine for a full upsert. The routine name is taken from the azure.yaml service name.

Note on routine config shape: the schema and deploy binding use the real API model vocabulary (timer/recurring/github_issue/custom triggers; invoke_agent_responses_api/invoke_agent_invocations_api actions) rather than placeholder names.

Testing

cd cli/azd/extensions/azure.ai.agents  && go build ./... && go test ./...
cd cli/azd/extensions/azure.ai.skills  && go build ./... && go test ./...
cd cli/azd/extensions/azure.ai.routines && go build ./... && go test ./...