Add Iced panel adapter and AI chat/script panels

- Implemented a theme system in `iced-panel-adapter` for consistent styling across panels.
- Created `iced-panel-ai-chat` for an AI assistant interface, including message handling and UI components.
- Developed `iced-panel-script` for a DSL editor with execution capabilities, allowing procedural drawing commands.
- Introduced message types for interaction in both chat and script panels.
- Added color and theme management for improved visual consistency.

hcie-iced-app/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "hcie-iced-app"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+hcie-iced-gui = { path = "crates/hcie-iced-gui" }
+hcie-engine-api = { path = "../hcie-engine-api" }