Emoji snapshot methods

We will never ship this by default, but it might make sense to do something like what [blowdryer did for 干](https://github.com/diffplug/blowdryer?tab=readme-ov-file#chinese-for-dry-%E5%B9%B2)

- `com.diffplug.selfie:selfie-kotlin-emoji`
- `expectSelfie` -> :mag_right:
- this would only work in kotlin, and it would have to be bracketed with double-backticks, but it stands out visually
- Unicode has both :mag_right: and 🔍, doesn't really matter which, but we should not do both and `:mag_right:` works in GitHub but `:mag_left:` doesn't so that's the tiebreaker
- another option is `expectSelfie` -> 📷
- `com.diffplug.selfie:selfie-ku`
- `expectSelfie` -> 𐌒
- this is using the old italic letter ku, which would work in java and kotlin

The code would look something like this

```kotlin
object 𐌒 {
@JvmStatic fun 𐌒(actual: String) = Selfie.expectSelfie(actual)
@JvmStatic fun 𐌒(actual: Int) = Selfie.expectSelfie(actual)
@JvmStatic fun 𐌒(actual: Boolean) = Selfie.expectSelfie(actual)
}
```

It's cute, but it's very easy for people to do themselves in their own projects, and it's probably a bad idea so we shouldn't encourage it by publishing artifacts for it.

The :mag_right: has a tiny sliver of functionality, the color does standout just a bit, seems appropriate.

提案されている絵文字の命名を理解するために、まず issue #53 とリンク先の blowdryer README を確認してください。リポジトリのファイル、テスト、エントリポイントは特定されておらず、issue 自体もこれらのアーティファクトを公開するのはおそらく悪い考えだと結論づけています。完了には、提案を進めるかどうか、およびどの正確な API をサポートするかについて maintainer が判断する必要があります。

索引モデルが issue の本文から書いたものです。