feat: implement Epic 0 - Project Setup & Foundation

Implemented all 5 stories from Epic 0:

Story 0.1: Project Initialization
- Initialize Go module with path git.dcentral.systems/toolz/goplt
- Create complete directory structure (cmd/, internal/, pkg/, modules/, config/, etc.)
- Add comprehensive .gitignore for Go projects
- Create README.md with project overview and setup instructions

Story 0.2: Configuration Management System
- Define ConfigProvider interface in pkg/config
- Implement Viper-based configuration in internal/config
- Create configuration loader with environment support
- Add default, development, and production YAML config files

Story 0.3: Structured Logging System
- Define Logger interface in pkg/logger
- Implement Zap-based logger in internal/logger
- Add request ID middleware for Gin
- Create global logger export with convenience functions
- Support context-aware logging with request/user ID extraction

Story 0.4: CI/CD Pipeline
- Create GitHub Actions workflow for CI (test, lint, build, fmt)
- Add comprehensive Makefile with development commands
- Configure golangci-lint with reasonable defaults

Story 0.5: Dependency Injection and Bootstrap
- Create FX-based DI container in internal/di
- Implement provider functions for Config and Logger
- Create application entry point in cmd/platform/main.go
- Add lifecycle management with graceful shutdown

All acceptance criteria met:
- go build ./cmd/platform succeeds
- go test ./... runs successfully
- go mod verify passes
- Config loads from config/default.yaml
- Logger can be injected and used
- Application starts and shuts down gracefully

.gitignore

@@ -1,24 +1,61 @@
-# MkDocs build output
-docs/site/
-docs/.mkdocs_cache/
-
-# Python
-__pycache__/
-*.py[cod]
-*$py.class
-*.so
-.Python
-venv/
-env/
-ENV/
-
-# Go (if not already present)
+# Binaries for programs and plugins
 *.exe
 *.exe~
 *.dll
 *.so
 *.dylib
+bin/
+dist/
+
+# Test binary, built with `go test -c`
 *.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
 *.out
+
+# Dependency directories
+vendor/
+
+# Go workspace file
 go.work
 
+# IDE files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+
+# Build artifacts
+build/
+*.a
+*.o
+
+# Test coverage files
+coverage.txt
+coverage.html
+*.coverprofile
+
+# Environment-specific files
+.env
+.env.local
+.env.*.local
+
+# Logs
+*.log
+logs/
+
+# Temporary files
+tmp/
+temp/
+
+# Documentation build artifacts
+docs/site/
+docs/.mkdocs_cache/
+
+# Docker
+.dockerignore
+
+# OS-specific
+Thumbs.db