feat: typing indicators, inspect-invite, and version bump

[yewreeka]

Summary

Merges the remaining stacked PRs into main:

• feat: add typing indicator support #19 — Typing indicator support (convos.org/typing_indicator:1.0)
• feat: add conversations inspect-invite command #20 — convos conversations inspect-invite command

(#18 read receipts was already merged to main.)

Typing indicators

• Standalone: convos conversation send-typing-indicator <id> / --stop
• Agent stdin: {"type":"typing"} / {"type":"typing","isTyping":false}
• Agent stdout: typing events when other members start/stop typing
• Matches iOS implementation (convos-ios#590)

Inspect invite

• convos conversations inspect-invite <slug-or-url>
• Offline decode + signature verification
• No identities created, no network connection

Version

0.5.4

Note

Add typing indicators and inspect-invite command to convos CLI

• Adds a new TypingIndicatorCodec in src/utils/typingIndicator.ts with helpers to encode/decode silent, non-pushed typing indicator messages.
• Adds convos conversation send-typing-indicator command to send typing indicators to a conversation, defaulting to isTyping=true unless --stop is passed.
• Adds convos conversations inspect-invite command to decode, verify, and display invite metadata (signature validity, expiration, creator) without joining a conversation.
• Updates the agent serve command to emit a typing event on incoming typing indicator messages and accept a typing stdin command to send them.
• Exports typing indicator utilities from src/index.ts for external consumers.

^{Macroscope summarized 48e55a9.}

[macroscopeapp]

Approvability

Verdict: Needs human review

This PR introduces new features: typing indicator support (new codec, new CLI command, agent protocol integration) and a new inspect-invite command. While the implementation appears clean and the changes are self-contained, new user-facing capabilities and protocol additions warrant human review.

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