[Feature]: Revision poll macro

Problem or Use Case

Making revision polls is a real pain in the butt. It requires pinging active devs, linking the set page and linking the proposal post in the forum. Despite there being a template to cut and paste, it's not uncommon for polls to get screwed up due to discord issues.

See this example: https://discord.com/channels/310192285306454017/403829803322572800/1395592470854762538

Proposed Solution

Add a command that will post a typical revision poll, formatted correctly with some syntax such as:

/revpoll activedev, setpagelink, discussionpostlink

Example: /revpoll lohankain, https://retroachievements.org/game/602, https://retroachievements.org/forums/topic/5250?comment=297018#297018

Many sets to be revised do not have active authors, so there'd need to be a "no active dev" case.

The output would be a properly formatted poll that looks like this: https://discord.com/channels/310192285306454017/403829803322572800/1380205896965165099

Alternative Solutions

No response

Command Type Preference

Slash command (/) - Preferred

Feature Scope

All users

Usage Examples

No response

Additional Context

No response

Checklist

• I have searched existing issues to ensure this feature hasn't been requested
• This feature would be useful to multiple users, not just me
• I have provided clear use cases and examples

Start by locating the existing slash-command implementations in RABot and compare their argument parsing and response formatting. Use the linked revision-poll examples as the expected output, then verify that /revpoll handles an active developer, the no-active-developer case, and both supplied links.