Initial commit: fastapi-traffic rate limiting library

- Core rate limiting with multiple algorithms (sliding window, token bucket, etc.)
- SQLite and memory backends
- Decorator and dependency injection patterns
- Middleware support
- Example usage files

fastapi_traffic/__init__.py

@@ -0,0 +1,36 @@
+"""FastAPI Traffic - Production-grade rate limiting for FastAPI."""
+
+from fastapi_traffic.core.decorator import rate_limit
+from fastapi_traffic.core.limiter import RateLimiter
+from fastapi_traffic.core.config import RateLimitConfig
+from fastapi_traffic.core.algorithms import Algorithm
+from fastapi_traffic.backends.base import Backend
+from fastapi_traffic.backends.memory import MemoryBackend
+from fastapi_traffic.backends.sqlite import SQLiteBackend
+from fastapi_traffic.exceptions import (
+    RateLimitExceeded,
+    BackendError,
+    ConfigurationError,
+)
+
+__version__ = "0.1.0"
+__all__ = [
+    "rate_limit",
+    "RateLimiter",
+    "RateLimitConfig",
+    "Algorithm",
+    "Backend",
+    "MemoryBackend",
+    "SQLiteBackend",
+    "RateLimitExceeded",
+    "BackendError",
+    "ConfigurationError",
+]
+
+# Optional Redis backend
+try:
+    from fastapi_traffic.backends.redis import RedisBackend
+
+    __all__.append("RedisBackend")
+except ImportError:
+    pass