Add API Docs

README.md

@@ -77,4 +77,69 @@ This teaches the specified spell to the specified player.
 This adds the specified spell to the item in the player's main hand.
 
 #### ```/spell remove <player> <spell-id>```
-This removes the specified spell from the item in the player's main hand.
+This removes the specified spell from the item in the player's main hand.
+
+## API
+1. Add Dependency to Gradle
+    ```gradle
+    repositories {
+      maven { url 'https://jitpack.io' }
+    }
+    dependencies {
+      modImplementation 'com.thebrokenrail:sorcerycraft:VERSION'
+    }
+    ```
+2. Add Dependency to ```fabric.mod.json```
+    ```json
+    {
+     "depends": {
+       "sorcerycraft": "VERSION"
+     }
+    }
+    ```
+3. Create a class extending ```com.thebrokenrail.sorcerycraft.spell.registry.Spell```
+    ```java
+    public class ExampleSpell extends Spell {
+       public ExampleSpell(Identifier id, int level) {
+           super(id, level);
+       }
+    
+       @Override
+       public void execute(Entity target, Entity source, Entity attacker) {
+           // Called when ExampleSpell hits an entity
+       }
+    
+       @Override
+       public void execute(World world, BlockHitResult hitResult) {
+           // Called when ExampleSpell hits a block
+       }
+    
+       @Override
+       public int getXPCost() {
+           // Return the amount of levels required to make ExampleSpell in a Casting Table
+       }
+    
+       @Override
+       public ItemStack getItemCost() {
+           // Return the item(s) required to make ExampleSpell in a Casting Table
+       }
+    
+       @Override
+       public int getMaxLevel() {
+           // Return ExampleSpell's maximum level
+       }
+    }
+    ```
+4. Register the Spell in your ModInitializer
+    ```java
+    public class ExampleMod implements ModInitializer {
+        @Override
+        public void onInitialize() {
+            SpellRegistry.registerSpell(new Identifier("modid", "example_spell"), ExampleSpell.class);
+        }
+    }
+    ```
+
+#### Useful Methods
+- ```Spell.getLevel()```
+- ```Spell.getID()```