Added ECS docs

docs/component/component.md

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+# Component
+### Contents
+[About](#About)
+
+## About
+Components are raw data that gets associated with an entity.
+
+For an Object-Oriented language like Java, they are objects.
+
+Each component is an array of objects, containing the data that should be associated with the entity.
+
+E.g.: A position component is defined such as:
+``` java
+class position{
+    double x = 0.0;
+    double y = 0.0;
+}
+```
+
+<br>
+
+As the component is simply an object, the associated data can be anything, including scripts:
+``` java
+class script{
+    String statement = "";
+    Function<void> foo = () -> {
+        statement += "boo";
+    };
+}
+```
+
+<br>
+<br>
+
+Two different usages of this data can then be applied:
+1. System-less data usage - which stores data but does not have a system that interacts with it every frame
+
+and 
+
+2. System-based interaction - which utilises the current data (of one or more components) to check if certain conditions have been met. 
+
+I.e.:
+
+The `position` component might not have a `position_system`, but may be utilised by the `collision_system`, which may use `position.x` and `position.y` to determine the location of the entity.
+
+See [System](./system/system.md) for more information.
+
+
+