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.

scenes/stickman_editor.tscn

@@ -58,6 +58,7 @@ anchors_preset = 15
 anchor_right = 1.0
 anchor_bottom = 1.0
 offset_top = 68.0
+offset_bottom = -28.0
 grow_horizontal = 2
 grow_vertical = 2
 theme_override_constants/separation = 6
@@ -149,3 +150,29 @@ max_value = 100.0
 value = 15.0
 step = 1.0
 rounded = true
+
+[node name="StatusBar" type="HBoxContainer" parent="."]
+unique_name_in_owner = true
+layout_mode = 1
+anchor_left = 0.0
+anchor_top = 1.0
+anchor_right = 1.0
+anchor_bottom = 1.0
+offset_top = -28.0
+grow_horizontal = 2
+grow_vertical = 0
+
+[node name="CursorCoords" type="Label" parent="StatusBar"]
+unique_name_in_owner = true
+layout_mode = 2
+size_flags_horizontal = 3
+text = ""
+horizontal_alignment = 0
+vertical_alignment = 1
+
+[node name="SnapStatus" type="Label" parent="StatusBar"]
+unique_name_in_owner = true
+layout_mode = 2
+text = "SNAP: OFF"
+horizontal_alignment = 2
+vertical_alignment = 1