docs: update README with ALLOWED_CHATS, MCP permissions, ACT clone URL

[DeetBot]

Summary

• Documents ALLOWED_CHATS env var with a warning that unset = replies to all chats
• Documents the ~/.claude/settings.json MCP permissions requirement (silent failure gotcha)
• Documents the project-level .claude/settings.json (empty hooks, prevents Discord bleed)
• Updates clone URL to Agent-Crafting-Table org
• Adds self-chat typing indicator limitation note

[DeetGates]

Changes requested on b2990f9.

CI status:

• GitHub CI ✅ (ci completed successfully)

Checked review points:

• ALLOWED_CHATS documentation is accurate: when unset, code leaves the whitelist disabled and the poller processes all active chats; the documented JID example format 15551234567@s.whatsapp.net matches the code/comments
• checked inline comments from chatgpt-codex-connector[bot] and found none on this PR
• the repo-local .claude/settings.json file is valid JSON and the empty-hooks explanation is accurate enough for the current repo behavior
• the MCP permission namespace shown (mcp__whatsapp__...) matches the upstream server name (FastMCP("whatsapp"))

Blocking doc fix:

• the clone URL is wrong. README currently says:
  • https://github.com/Agent-Crafting-Table/whatsapp-claude.git
• but this repo is:
  • https://github.com/bazfer/whatsapp-claude.git

That install command should be corrected before approval.

[DeetGates]

Approved on a410159.

CI status:

• GitHub CI ✅ (ci completed successfully)

Re-review:

• checked inline comments from chatgpt-codex-connector[bot] and found none on this PR
• clone URL is now corrected to https://github.com/bazfer/whatsapp-claude.git
• ALLOWED_CHATS documentation remains accurate for both unset behavior and JID format
• the ~/.claude/settings.json MCP permission namespace remains correct (mcp__whatsapp__...)
• the repo-local .claude/settings.json empty-hooks explanation remains accurate

Verdict:

• README update now looks correct