Add Clide project structure and initial implementation

Set up the TUI IDE wrapper for Claude Code CLI with:
- Core app structure using Textual framework
- Panel architecture (sidebar, workspace, claude, context)
- Theme system with 22 built-in themes (Summer Night default)
- Pydantic models for configuration and data
- Makefile for development commands
- Project documentation and specs

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -1,3 +1,10 @@
 # clide
 
-CLI Claude
+Clide - a Claude CLI UI
+
+A TUI cli IDE for claude code cli. Features file navigator/git panel left bar, main panel with integrated terminal running claude, right panel for integration of IMAGIN.studio img cli Atlassian JIRA/CONFLUENCE tooling. 
+
+- Python 3.12 based
+- Pydantic strict data handling
+- Typer as cli integration
+- Textual for TUI