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>

.gitignore

@@ -174,3 +174,10 @@ cython_debug/
 # PyPI configuration file
 .pypirc
 
+
+# Clide specific
+.config/
+snapshot_report.html
+
+# Claude Code
+.claude/