Block Outline Customizer

## Block Outline Customizer 1.4.0

### New
- **Completely new config screen** — dark, tabbed layout (Outline / Fill / Effects / General) with a **live preview**: opened in-game, the real outline updates as you drag; opened from the menu, a preview cube shows your style
- **Outline styles**: Full, Corners only, or Dashed
- **Moving outline** — the dashed style can march around the block, with adjustable speed
- **RGB from corner** — gradient mode that flows the colors across the block instead of one uniform color
- **Custom RGB colors** — pick up to 10 colors for the RGB cycle instead of the full rainbow (leave empty for classic rainbow)
- **Presets** — Classic, Neon, Subtle and Rainbow built in, plus a slot to save your own
- **Per-block / per-tag overrides** — give specific blocks or tags (e.g. `#c:ores`) their own style via the config file
- **Shader fix** option — makes the width slider work when a shader pack overrides the line renderer (use when shaders are on)
- **Hex color input** with color swatch next to the RGB sliders
- Translations: English, French, German, Spanish, Portuguese (BR), Russian, Chinese (Simplified)
- ModMenu integration (Fabric) and mods-list Config button (Forge/NeoForge)

### Changed
- One unified JSON config (`config/blockoutlinecustomizer.json`) shared by all loaders — your old settings are migrated automatically
- The mod now fully replaces the vanilla outline renderer instead of restyling it — cleaner and more consistent
- Default keybind to open the config is **U**
- License changed to **MIT**

### Fixed
- Outline width slider had no visible effect (it now controls real line thickness)
- Outline lines could thin out or vanish at certain camera angles
- RGB animation could stutter/snap periodically