Command: Add tls ech for ech config generation

[chise0713]

Imported a new third party library
Linked: #3253

❯ xray help tls ech
usage: xray tls ech [--serverName (string)] [--json]

Generate TLS-ECH certificates.

Set serverName to your custom string: xray tls ech --serverName (string)
Generate into json format: xray tls ech --json
❯ xray tls ech --json
{
  "configs": [
    "-----BEGIN ECH CONFIGS-----",
    "AGX+DQBhAAAgACB8/cOtDQ7QFb7M/K0AfPCS2JQrm3YgsaBNjs1Iy3sbWQAkAAEA",
    "AQABAAIAAQADAAIAAQACAAIAAgADAAMAAQADAAIAAwADABJjbG91ZGZsYXJlLWVj",
    "aC5jb20AAA==",
    "-----END ECH CONFIGS-----"
  ]
}
{
  "key": [
    "-----BEGIN ECH KEYS-----",
    "ACBW4nrwSSH24aOXnYfYd21HWIPi8uM8jivODHfe8GIMqQBl/g0AYQAAIAAgfP3D",
    "rQ0O0BW+zPytAHzwktiUK5t2ILGgTY7NSMt7G1kAJAABAAEAAQACAAEAAwACAAEA",
    "AgACAAIAAwADAAEAAwACAAMAAwASY2xvdWRmbGFyZS1lY2guY29tAAA=",
    "-----END ECH KEYS-----"
  ]
}

[yuhan6665]

感谢千世 虽然加依赖不太清真 但是这次先这样吧

[Fangliding]

ech都没有先搞echgenkey了()