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/assets/icons/vector_rhombus.svg

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" fill="none" stroke="currentColor" color="#fff" stroke-width="1.80" stroke-linejoin="round">
+  <g transform="translate(40.96,40.96) scale(17.920000) translate(-0.00,-0.00)">
+    <polygon points="12,3 21,12 12,21 3,12"/>
+  </g>
+</svg>
+