feat: Refactor Iced panel adapter and introduce build metadata management
- Updated Cargo.toml files across multiple crates to use workspace versioning.
- Enhanced the `iced-panel-adapter` to include a new `plain_slider` module and updated widget rendering to support theme colors.
- Added new theme color utilities for recessed and elevated surfaces in `iced-panel-adapter`.
- Introduced a new `hcie-build-info` crate to manage build metadata, including a build ID system.
- Created a build script to synchronize build IDs across the workspace.
- Added a Makefile for simplified build commands for the Iced application.
- Implemented regression tests for vector shape creation history in the engine API.
- Added a new script for managing Cargo commands with synchronized build ID increments.
- Updated line count report to reflect recent changes in codebase.
- Created a visual plan document for future improvements in the Iced history and panel systems.
- Add `persistence.rs` for stable serialization of dock layouts without runtime identifiers.
- Introduce `preview.rs` for geometry handling of dock drop previews.
- Create `sizing.rs` to manage content-aware sizing policies and constraint solving for dock panels.
- Implement `welcome.rs` to provide a welcome surface when no documents are open, featuring New and Open actions.
- 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.
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