[PM-20073] Migrate SyncApi to the network module (#5028)

network/src/main/kotlin/com/bitwarden/network/api/SyncApi.kt

@@ -0,0 +1,21 @@
+package com.bitwarden.network.api
+
+import com.bitwarden.network.model.NetworkResult
+import com.bitwarden.network.model.SyncResponseJson
+import retrofit2.http.GET
+
+/**
+ * This interface defines the API service for fetching vault data.
+ */
+interface SyncApi {
+    /**
+     * Retrieves the vault data from the server.
+     *
+     * @return A [SyncResponseJson] containing the vault response model.
+     */
+    @GET("sync")
+    suspend fun sync(): NetworkResult<SyncResponseJson>
+
+    @GET("/accounts/revision-date")
+    suspend fun getAccountRevisionDateMillis(): NetworkResult<Long>
+}