feat(messages): Implement "message read by" counter

This commit introduces the ability to see how many people have read an outgoing message in a group chat. A "views" count is now displayed in the message options dialog for relevant messages.

- **API & Data Layer:**
  - Added `getMessageReadPeers` to `MessagesService` and `MessagesRepository` to fetch users who have read a specific message.
  - Introduced `MessagesGetReadPeersResponse` to handle the API response.
  - A new URL constant `GET_MESSAGE_READ_PEERS` was added.

- **Domain Layer:**
  - A new `GetMessageReadPeersUseCase` is created to provide the view count to the ViewModel.
  - The use case is registered in the `DomainModule`.

- **ViewModel:**
  - `MessagesHistoryViewModel` now includes `loadMessageReadPeers` to asynchronously fetch and return the view count for a message.

- **UI (Compose):**
  - The `MessageOptionsDialog` now displays a "views" count for outgoing chat messages.
  - It uses a `LaunchedEffect` to call `loadMessageReadPeers` when the dialog is shown.
  - The `visibility` icon has been updated and its XML file renamed to `round_visibility_24px.xml` to follow a consistent naming convention.

- **Refactoring & Minor Fixes:**
  - Simplified several `derivedStateOf` usages to direct calculations or property delegates in `MessageBubble.kt` and `MessagesList.kt` for minor performance improvements.
  - Renamed `IncomingMessageBubble.kt` and `OutgoingMessageBubble.kt` to `MessageBubbleIncoming.kt` and `MessageBubbleOutgoing.kt` respectively for consistency.
  - Removed an unnecessary log statement in `MessagesList.kt`.

core/domain/src/main/kotlin/dev/meloda/fast/domain/GetMessageReadPeersUseCase.kt

@@ -0,0 +1,21 @@
+package dev.meloda.fast.domain
+
+import dev.meloda.fast.data.State
+import dev.meloda.fast.data.api.messages.MessagesRepository
+import dev.meloda.fast.data.mapToState
+import kotlinx.coroutines.flow.Flow
+
+class GetMessageReadPeersUseCase(
+    private val repository: MessagesRepository
+) : BaseUseCase {
+
+    operator fun invoke(
+        peerId: Long,
+        cmId: Long
+    ): Flow<State<Int>> = flowNewState {
+        repository.getMessageReadPeers(
+            peerId = peerId,
+            cmId = cmId
+        ).mapToState(successMapper = { it.totalCount })
+    }
+}

core/domain/src/main/kotlin/dev/meloda/fast/domain/di/DomainModule.kt

@@ -6,6 +6,7 @@ import dev.meloda.fast.domain.AccountUseCaseImpl
 import dev.meloda.fast.domain.GetCurrentAccountUseCase
 import dev.meloda.fast.domain.GetLocalUserByIdUseCase
 import dev.meloda.fast.domain.GetLocalUsersByIdsUseCase
+import dev.meloda.fast.domain.GetMessageReadPeersUseCase
 import dev.meloda.fast.domain.LoadConversationsByIdUseCase
 import dev.meloda.fast.domain.LoadUserByIdUseCase
 import dev.meloda.fast.domain.LoadUsersByIdsUseCase
@@ -27,4 +28,6 @@ val domainModule = module {
     singleOf(::GetCurrentAccountUseCase)
 
     singleOf(::LoadConversationsByIdUseCase)
+
+    singleOf(::GetMessageReadPeersUseCase)
 }