utils/shell: add support for vox in xonsh shell

Author: guysalt

src/poetry/utils/shell.py

@@ -105,7 +105,9 @@ def activate(self, env: VirtualEnv) -> int | None:
         if self._name in ["zsh", "nu"]:
             c.setecho(False)
 
-        if self._name == "zsh":
+        if self._name == "xonsh":
+            c.sendline(f"vox activate {shlex.quote(str(env.path))}")
+        elif self._name == "zsh":
             # Under ZSH the source command should be invoked in zsh's bash emulator
             c.sendline(f"emulate bash -c '. {shlex.quote(str(activate_path))}'")
         else: