This change introduces a new EditorThemeManager class
to abstract theme generatio and its subroutines.
Logic related to EditorTheme, EditorColorMap, and editor
icons has been extracted into their respective files with
includes cleaned up.
All related files have been moved to a separate folder to
better scope them in the project. This includes relevant
generated files as well.
The GridMap editor's grid previously did not not move when moving
the tile cursor, only on certain menu actions.
This commit adds an update_grid call for valid mouse movement in
the editor, changes update_grid to only offset if there's a valid
cursor, and adds updates for the grid and cursor when a mesh library
is changed since we need the new RID for the update_grid check,
and if we remove the mesh library we want to make sure it gets
recentered. As a nice side-effect, it also updates to the new cursor
mesh if you load a new mesh library.
Fixes#57068
Also start organizing editor-specific GUI components
into a dedicated folder, `editor/gui`.
Also move `editor_file_server` next to the rest of debugger classes.