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>

installlocal.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+# Build (if needed) and install mcpctl RPM locally
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+cd "$SCRIPT_DIR"
+
+RPM_FILE=$(ls dist/mcpctl-*.rpm 2>/dev/null | head -1)
+
+# Build if no RPM exists or if source is newer than the RPM
+if [[ -z "$RPM_FILE" ]] || [[ $(find src/ -name '*.ts' -newer "$RPM_FILE" 2>/dev/null | head -1) ]]; then
+    echo "==> Building RPM..."
+    bash scripts/build-rpm.sh
+    RPM_FILE=$(ls dist/mcpctl-*.rpm 2>/dev/null | head -1)
+else
+    echo "==> RPM is up to date: $RPM_FILE"
+fi
+
+echo "==> Installing $RPM_FILE..."
+sudo rpm -Uvh --force "$RPM_FILE"
+
+echo "==> Reloading systemd user units..."
+systemctl --user daemon-reload
+
+echo "==> Done!"
+echo "    Enable mcplocal: systemctl --user enable --now mcplocal"