Add file exclusion to Find In Files

[monxa]

Describe the project you are working on

Godot all day.

Describe the problem or limitation you are having in your project

The Find in Files dialogue misses an option to exclude files and directories. A common use-case might be the exclusion of res://addons

Describe the feature / enhancement and how it helps to overcome the problem or limitation

As the most straightforward solution, I propose a regex search box entry to exclude any parts of paths in the Find In Files dialogue.

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

• FindInFiles: Setter, regex logic.
• FindInFilesDialog: Exclude label, lineedit,
• FindInFilesPanel: Display exclude in the header.
• ScriptEditorPlugin controller glue adjustements.

If this enhancement will not be used often, can it be worked around with a few lines of script?

Core

Is there a reason why this should be core and not an add-on in the asset library?

Metal core.

[Calinou]

Thanks for the proposal! Consolidating in #8384.