kind is a deployment property, not a program property

A program has no single kind — it HAS deployments, each with its own kind (a
program can be a tool AND a job, e.g. protonmail). Remove program-level kind:

- core: drop ProgramSpec.kind; CastleConfig.kind_of → deployments_of(name) →
  [(deployment-name, kind)]; tools property derives from a tool deployment.
- api: ProgramSummary drops kind/services/jobs → deployments: [{name, kind}];
  /programs?kind= filters by deployment-kind membership; a program's legacy
  DeploymentSummary carries kind=None.
- cli: list/info show a program's set of deployment kinds; --kind filters by
  membership.

Also: Services page now covers statics — /services returns kind in
{service, static} (both are exposed, URL-reachable 'services', caddy vs systemd),
and ServiceSummary gains kind + manager to distinguish them.

Suites: core 124, cli 25, castle-api 58.

cli/src/castle_cli/commands/create.py

@@ -144,10 +144,6 @@ def run_create(args: argparse.Namespace) -> int:
             ),
         )
 
-    # Populate the derived kind on the in-memory program so readers see the live
-    # value immediately (it's excluded from disk — kind_of recomputes on load).
-    config.programs[name].kind = config.kind_of(name)
-
     save_config(config)
 
     label = f"{stack} program" if stack else "bare program"