Add newproject command and fix template bugs

- Add newproject, ssh, templates commands for full project scaffolding
- Add homelab SSH, Caddy, port, and proxy_host fields to Config
- Fix dotEnvExample: use container-internal port (3000/8000/8080) not host port
- Fix caddySnippet: use configurable proxy_host instead of localhost
- Fix dockerComposeTemplate: add build: path so image-less deploys work
- Commit gtea.exe binary

cmd/ssh.go

@@ -0,0 +1,37 @@
+package cmd
+
+import (
+	"fmt"
+	"os/exec"
+	"path"
+	"strings"
+)
+
+// sshRun executes a shell command on the remote host, returning combined output.
+// Uses the system ssh binary so existing keys and ~/.ssh/config are honored.
+func sshRun(user, host, command string) (string, error) {
+	c := exec.Command("ssh", "-o", "BatchMode=yes", user+"@"+host, command)
+	out, err := c.CombinedOutput()
+	if err != nil {
+		trimmed := strings.TrimSpace(string(out))
+		if trimmed != "" {
+			return string(out), fmt.Errorf("ssh %s@%s: %s: %w", user, host, trimmed, err)
+		}
+		return string(out), fmt.Errorf("ssh %s@%s: command failed: %w", user, host, err)
+	}
+	return string(out), nil
+}
+
+// sshWriteFile writes content to a remote file, creating parent directories.
+// Content is streamed via stdin to avoid shell escaping issues.
+func sshWriteFile(user, host, remotePath, content string) error {
+	dir := path.Dir(remotePath)
+	cmd := fmt.Sprintf("mkdir -p %s && cat > %s", dir, remotePath)
+	c := exec.Command("ssh", "-o", "BatchMode=yes", user+"@"+host, cmd)
+	c.Stdin = strings.NewReader(content)
+	if out, err := c.CombinedOutput(); err != nil {
+		return fmt.Errorf("writing %s on %s@%s: %s: %w",
+			remotePath, user, host, strings.TrimSpace(string(out)), err)
+	}
+	return nil
+}