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>

deploy/entrypoint.sh

@@ -4,8 +4,8 @@ set -e
 echo "mcpd: pushing database schema..."
 pnpm -F @mcpctl/db exec prisma db push --schema=prisma/schema.prisma --accept-data-loss 2>&1
 
-echo "mcpd: seeding default data..."
-node src/mcpd/dist/seed-runner.js
+echo "mcpd: seeding templates..."
+TEMPLATES_DIR=templates node src/mcpd/dist/seed-runner.js
 
 echo "mcpd: starting server..."
 exec node src/mcpd/dist/main.js