feat: allow users to add auto reply triggers

[ajohn25]

Description

This PR allows admins to add auto reply triggers when editing a campaign. It also adds logic for marking contacts ineligible for auto replies, when a message is sent to them from Message Review

Motivation and Context

Closes #1663

How Has This Been Tested?

This has been tested locally:

• [x] Auto reply triggers are copied when copying a campaign
• [x] Setting up multiple interaction steps on the same level of the tree with the same auto reply token fails on save with a friendly error
• [x] Auto reply eligilble conversations do not appear in Texter Todos
• [x] Sending from Message Review marks the conversation as ineligible and drops retry jobs
• [x] Pasting multiple words separated by commas automatically creates separate tokens

  Screenshots (if appropriate):

Documentation Changes

Checklist:

• [x] My change requires a change to the documentation.
• [ ] I have included updates for the documentation accordingly.

[ajohn25]

This is ready for review! See notes about failing test in #1663