feat: PlantDB types and interfaces

Created the types and interfaces relating to the PlantDatabase

src/main/java/ch/zhaw/gartenverwaltung/io/PlantDatabase.java

@@ -0,0 +1,12 @@
+package ch.zhaw.gartenverwaltung.io;
+
+import ch.zhaw.gartenverwaltung.types.Plant;
+import ch.zhaw.gartenverwaltung.types.HardinessZone;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface PlantDatabase {
+    List<Plant> getPlantList(HardinessZone zone);
+    Optional<Plant> getPlantById(long id);
+}

src/main/java/ch/zhaw/gartenverwaltung/types/GrowthPhase.java

@@ -0,0 +1,9 @@
+package ch.zhaw.gartenverwaltung.types;
+
+import java.util.Date;
+
+public record GrowthPhase(Date startDate,
+                          Date endDate,
+                          GrowthPhaseType type,
+                          HardinessZone zone) {
+}

src/main/java/ch/zhaw/gartenverwaltung/types/GrowthPhaseType.java

@@ -0,0 +1,5 @@
+package ch.zhaw.gartenverwaltung.types;
+
+public enum GrowthPhaseType {
+    SOW, PLANT, HARVEST
+}

src/main/java/ch/zhaw/gartenverwaltung/types/HardinessZone.java

@@ -0,0 +1,9 @@
+package ch.zhaw.gartenverwaltung.types;
+
+/**
+ * Represents the available hardiness zones
+ * (Subject to later expansion)
+ */
+public enum HardinessZone {
+    ZONE_8A
+}

src/main/java/ch/zhaw/gartenverwaltung/types/Plant.java

@@ -0,0 +1,11 @@
+package ch.zhaw.gartenverwaltung.types;
+
+import java.util.List;
+
+public record Plant(
+        long id,
+        String name,
+        String description,
+        int spacing,
+        List<GrowthPhase> lifecycle) {
+}