Add ESCAnimationResource to hold characters animations. (#342)

Co-authored-by: StraToN <StraToN@users.noreply.github.com>
Co-authored-by: Dennis Ploeger <develop@dieploegers.de>
Co-authored-by: dploeger <dploeger@users.noreply.github.com>

docs/api/ESCDirectionAngle.md

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+<!-- Auto-generated from JSON by GDScript docs maker. Do not edit this document directly. -->
+
+# ESCDirectionAngle
+
+**Extends:** [Resource](../Resource)
+
+## Description
+
+ Class defining an angle, with a start angle (between 0 and 360) and a size.
+
+## Property Descriptions
+
+### angle\_start
+
+```gdscript
+export var angle_start: int = 0
+```
+
+Start angle of the directional angle.
+
+### angle\_size
+
+```gdscript
+export var angle_size: int = 0
+```
+
+Size of the angle