Add a dedicated long editor

[mornhussakuyo-hub]

Type of change

• Bug fix
• New feature
• Refactor

Description

LongSetting currently uses a raw text box, with its input handling embedded in DefaultSettingsWidgetFactory.

This adds a dedicated WLongEdit, exposes it through GuiTheme.longEdit(...), and uses it for long settings. The editor handles parsing, range validation and invalid-input rollback while preserving full 64-bit precision.

Related issues

Follow-up to #6651.

How Has This Been Tested?

• Ran ./gradlew build with Java 25.
• Ran 73 checks against the compiled editor, text box, settings factory and LongSetting, covering signed-long limits, values above 2^53, min/max validation, overflow, invalid-input rollback, Enter/focus-loss callbacks and reset.
• Tested the packaged mod in Minecraft 26.2 with a temporary test addon. Bounds, precision, input handling, reset and persistence after restarting the client worked correctly.

Checklist:

• My code follows the style guidelines of this project.
• The change has no complex areas that need explanatory comments.
• I have tested the code in both development and production environments.

[Frko5000]

i might be missing something