Port Injector to main layout

Adds deobfuscator
Adds injected-client
Adds injector-plugin
Adds runescape-client

Replaces RL's apis

Small bug with sprites atm, will be resolved soon. tired af.

Builds, probably

runescape-client/src/main/java/Usernamed.java

@@ -0,0 +1,16 @@
+import net.runelite.mapping.Export;
+import net.runelite.mapping.Implements;
+import net.runelite.mapping.ObfuscatedName;
+import net.runelite.mapping.ObfuscatedSignature;
+
+@ObfuscatedName("ky")
+@Implements("Usernamed")
+public interface Usernamed {
+   @ObfuscatedName("kr")
+   @ObfuscatedSignature(
+      signature = "(B)Lkp;",
+      garbageValue = "-87"
+   )
+   @Export("username")
+   Username username();
+}