Build agent.exe on any Windows machine

1) Open PowerShell as Administrator
2) In this folder, run:
   .\build.ps1

Output:
- dist\agent\agent.exe

Install service using the EXE:
1) Set env vars first (see README.txt)
2) Run:
   .\install-exe.ps1

Note:
- The EXE still uses SSH and the local API. You must set env vars:
  AGENT_TOKEN, SSH_USER, SSH_HOST, SSH_PORT, REVERSE_VNC_PORT, REVERSE_AGENT_PORT
