fix(agent/windows): named pipe Tailscale + hideWindow + logs

- Use Windows named pipe \.\pipe\studioe5-tailscaled instead of Unix socket
- Apply hideWindow to all child processes (tailscale, podman, docker, browser)
- Redirect agent logs to <data-dir>/agent.log and tailscaled logs to tailscaled.log
- Fix double tailscale/ tailscale dir path in startTailscaleAndReport
- Remove --operator=root on Windows
- Bump agent version to 0.3.1

agent/build.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 set -e
 
-VERSION="0.3.0"
+VERSION="0.3.1"
 APP_NAME="studioE5"
 BIN_NAME="studioE5-agent"
 LDFLAGS="-X main.version=${VERSION}"