Implement Phase 6 features for Stickman Editor

- Updated BUGS.md with new issues related to selection bounding box, touchpad panning speed, and zooming behavior.
- Enhanced PROJECT.md with detailed specifications for touchpad controls, recent colors in the color picker, and a status bar for project information.
- Modified project.godot to update compatibility version to 4.7.
- Added a status bar in stickman_editor.tscn to display cursor coordinates and snap status.
- Updated body_part_panel.gd to handle recent colors and cursor detection over drawing areas.
- Enhanced stickman_editor.gd to manage cursor coordinates display and recent colors tracking.
- Improved whole_stickman_preview.gd to render selection gizmos on top of other parts.
- Created master_rig.tscn for the stickman rig structure with bones and IK targets.
- Developed master_rig_builder.gd to automate the rig building process with remote transforms and IK modifications.

project.godot

@@ -8,9 +8,13 @@
 
 config_version=5
 
+[animation]
+
+compatibility/default_parent_skeleton_in_mesh_instance_3d=true
+
 [application]
 
 config/name="stickman"
 run/main_scene="uid://c5jkoyu1ik6fo"
-config/features=PackedStringArray("4.4", "Forward Plus")
+config/features=PackedStringArray("4.7", "Forward Plus")
 config/icon="res://icon.svg"