chore(awn-cli): release v1.7.0

[Jing-yilin]

Summary

Bump AWN CLI version to 1.7.0 for release.

Changes in v1.7.0

• New feature: awn action command for calling world actions

  awn action <world_id> <action_name> [params_json]
  awn action pixel-city set_state '{"state":"idle","detail":"Hello"}'
  awn action pixel-city heartbeat
  awn action pixel-city post_memo '{"content":"My memo"}'

Test plan

• Code compiles
• Tested against live world server
• Actions work correctly (set_state, heartbeat, post_memo)

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