add ReadStandardKeyValueRepo#keys with value parameter

repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/StandartKeyValueRepo.kt

@@ -8,6 +8,7 @@ interface ReadStandardKeyValueRepo<Key, Value> : Repo {
     suspend fun get(k: Key): Value?
     suspend fun values(pagination: Pagination, reversed: Boolean = false): PaginationResult<Value>
     suspend fun keys(pagination: Pagination, reversed: Boolean = false): PaginationResult<Key>
+    suspend fun keys(v: Value, pagination: Pagination, reversed: Boolean = false): PaginationResult<Key>
     suspend fun contains(key: Key): Boolean
     suspend fun count(): Long
 }

repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/mappers/KeyValueMappers.kt

@@ -44,6 +44,23 @@ open class MapperReadStandardKeyValueRepo<FromKey, FromValue, ToKey, ToValue>(
         )
     }
 
+    override suspend fun keys(
+        v: FromValue,
+        pagination: Pagination,
+        reversed: Boolean
+    ): PaginationResult<FromKey> = to.keys(
+        v.toOutValue(),
+        pagination,
+        reversed
+    ).let {
+        PaginationResult(
+            it.page,
+            it.pagesNumber,
+            it.results.map { it.toInnerKey() },
+            it.size
+        )
+    }
+
     override suspend fun contains(key: FromKey): Boolean = to.contains(
         key.toOutKey()
     )

repos/common/src/main/kotlin/dev/inmo/micro_utils/repos/keyvalue/KeyValueStore.kt

@@ -96,6 +96,20 @@ class KeyValueStore<T : Any> internal constructor (
         }
     }
 
+    override suspend fun keys(v: T, pagination: Pagination, reversed: Boolean): PaginationResult<String> {
+        val resultPagination = if (reversed) pagination.reverse(count()) else pagination
+        return sharedPreferences.all.mapNotNull { (k, value) -> if (value == v) k else null }.paginate(
+            resultPagination
+        ).let {
+            PaginationResult(
+                it.page,
+                it.pagesNumber,
+                it.results.let { if (reversed) it.reversed() else it },
+                it.size
+            )
+        }
+    }
+
     override suspend fun contains(key: String): Boolean = sharedPreferences.contains(key)
 
     override suspend fun count(): Long = sharedPreferences.all.size.toLong()