feat: create project directory structure

- Create main process structure (services, dao, controllers, models, utils, config)
- Create preload script directory with .gitkeep
- Create renderer structure (pages, components, hooks, styles)
- Add placeholder App.tsx for React (to be implemented in later tasks)
- Create config, tests, logs directories
- Create data directories (temp, output, reports)
- Update .gitignore to exclude logs, data files, and environment configs

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

.gitignore

@@ -6,4 +6,20 @@ out
 *.log*
 
 #AI Agent
-.claude
+.claude
+
+# Logs
+logs/
+*.log
+
+# Data
+data/temp/*
+data/output/*
+data/reports/*
+!data/temp/.gitkeep
+!data/output/.gitkeep
+!data/reports/.gitkeep
+
+# Environment
+config/.env
+config/.env.local