feat: add MCP server templates and deployment infrastructure

Introduce a Helm-chart-like template system for MCP servers. Templates are
YAML files in templates/ that get seeded into the DB on startup. Users can
browse them with `mcpctl get templates`, inspect with `mcpctl describe
template`, and instantiate with `mcpctl create server --from-template=`.

Also adds Portainer deployment scripts, mcplocal systemd service,
Streamable HTTP MCP endpoint, and RPM packaging for mcpctl-local.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

pnpm-lock.yaml

@@ -112,6 +112,9 @@ importers:
       fastify:
         specifier: ^5.0.0
         version: 5.7.4
+      js-yaml:
+        specifier: ^4.1.0
+        version: 4.1.1
       zod:
         specifier: ^3.24.0
         version: 3.25.76
@@ -122,6 +125,9 @@ importers:
       '@types/dockerode':
         specifier: ^4.0.1
         version: 4.0.1
+      '@types/js-yaml':
+        specifier: ^4.0.9
+        version: 4.0.9
       '@types/node':
         specifier: ^25.3.0
         version: 25.3.0