Move FollowSet to it's own class.

quartz/src/main/java/com/vitorpamplona/quartz/events/PeopleListEvent.kt

@@ -21,7 +21,6 @@
 package com.vitorpamplona.quartz.events
 
 import androidx.compose.runtime.Immutable
-import androidx.compose.runtime.Stable
 import com.vitorpamplona.quartz.encoders.HexKey
 import com.vitorpamplona.quartz.signers.NostrSigner
 import com.vitorpamplona.quartz.utils.TimeUtils
@@ -77,45 +76,6 @@ class PeopleListEvent(
         }
     }
 
-    @Stable
-    class FollowSet(
-        val isPrivate: Boolean,
-        val title: String,
-        val description: String?,
-        val profileList: Set<String>,
-    ) {
-        companion object {
-            fun mapEventToSet(
-                event: PeopleListEvent,
-                signer: NostrSigner,
-            ): FollowSet {
-                val dTag = event.dTag()
-                val listTitle = event.title() ?: dTag
-                val listDescription = event.description() ?: ""
-                val publicFollows = event.filterTagList("p", null)
-                val privateFollows = mutableListOf<String>()
-                event.privateTaggedUsers(signer) { userList -> privateFollows.addAll(userList) }
-                return if (publicFollows.isEmpty() && privateFollows.isNotEmpty()) {
-                    FollowSet(
-                        isPrivate = true,
-                        title = listTitle,
-                        description = listDescription,
-                        profileList = privateFollows.toSet(),
-                    )
-                } else if (publicFollows.isNotEmpty() && privateFollows.isEmpty()) {
-                    FollowSet(
-                        isPrivate = false,
-                        title = listTitle,
-                        description = listDescription,
-                        profileList = publicFollows.toSet(),
-                    )
-                } else {
-                    throw Exception("Mixed follow sets are not yet supported.")
-                }
-            }
-        }
-    }
-
     @Immutable
     class UsersAndWords(
         val users: Set<String> = setOf(),