add nodes endpoint

- add NodesController
  - add NodesEndpoint
  - add NodesControllerTest
  - add NodesController
  - add nodes.http

- add NodeEntity toNodesResponse in Mapping.kt

- add getNodes to NodeService

- add findAll to NodeRepository

src/test/kotlin/ltd/hlaeja/controller/NodesControllerTest.kt

@@ -0,0 +1,58 @@
+package ltd.hlaeja.controller
+
+import io.mockk.coEvery
+import io.mockk.coVerify
+import io.mockk.mockk
+import java.time.LocalDateTime
+import java.time.ZoneId
+import java.time.ZonedDateTime
+import java.util.UUID
+import kotlinx.coroutines.flow.flowOf
+import kotlinx.coroutines.flow.single
+import kotlinx.coroutines.test.runTest
+import ltd.hlaeja.entity.NodeEntity
+import ltd.hlaeja.service.NodeService
+import ltd.hlaeja.test.isEqualToUuid
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+
+class NodesControllerTest {
+    companion object {
+        const val NAME: String = "My Device"
+        const val NIL_UUID: String = "00000000-0000-0000-0000-000000000000"
+        val id: UUID = UUID.fromString(NIL_UUID)
+        val client: UUID = UUID.fromString(NIL_UUID)
+        val device: UUID = UUID.fromString(NIL_UUID)
+        val timestamp: ZonedDateTime = ZonedDateTime.of(LocalDateTime.of(2000, 1, 1, 0, 0, 0, 1), ZoneId.of("UTC"))
+    }
+
+    val service: NodeService = mockk()
+
+    lateinit var controller: NodesController
+
+    @BeforeEach
+    fun setUp() {
+        controller = NodesController(service)
+    }
+
+    @Test
+    fun `get all nodes`() = runTest {
+        // given
+        coEvery {
+            service.getNodes(any(), any())
+        } returns flowOf(NodeEntity(id, timestamp, client, device, NAME))
+
+        // when
+        val response = controller.getNodes().single()
+
+        // then
+        coVerify(exactly = 1) { service.getNodes(0, 25) }
+
+        assertThat(response.id).isEqualToUuid(NIL_UUID)
+        assertThat(response.timestamp).isEqualTo(timestamp)
+        assertThat(response.client).isEqualToUuid(NIL_UUID)
+        assertThat(response.device).isEqualToUuid(NIL_UUID)
+        assertThat(response.name).isEqualTo(NAME)
+    }
+}