Umnik number feature request

I want to be able to know how many clones of me is equivalent to one Um_nik based on the "teamrate" calculation.

For example, it might work like this:

```
;umniknumber Monogon
TLE: "Um_nik is equivalent to 69 of Monogon"
;umniknumber Um_nik
TLE: "Um_nik is equivalent to 1 Um_nik"
```

Start by locating the existing `teamrate` calculation and the command entry point that handles semicolon-prefixed commands. Check how those commands format TLE responses and how the `Um_nik` identity is represented. Done means `;umniknumber` reports the equivalent count for a named clone and returns 1 for `Um_nik`, matching the examples.

Written by the indexing model from the issue text.