Implement policy system with comprehensive testing and configuration

- Introduced a new policy system for event processing, allowing fine-grained control over event storage and retrieval based on various criteria.
- Added support for policy configuration via JSON files, including whitelists, blacklists, and custom scripts.
- Implemented a test suite for the policy system, ensuring 100% test coverage of core functionality and edge cases.
- Created benchmark tests to evaluate policy performance under various conditions.
- Updated event handling to integrate policy checks for both read and write access.
- Enhanced documentation with examples and usage instructions for the policy system.
- Bumped version to v0.16.0.

app/main.go

@@ -11,6 +11,7 @@ import (
 	"next.orly.dev/pkg/crypto/keys"
 	"next.orly.dev/pkg/database"
 	"next.orly.dev/pkg/encoders/bech32encoding"
+	"next.orly.dev/pkg/policy"
 	"next.orly.dev/pkg/protocol/publish"
 )
 
@@ -60,6 +61,9 @@ func Run(
 
 	// Initialize sprocket manager
 	l.sprocketManager = NewSprocketManager(ctx, cfg.AppName, cfg.SprocketEnabled)
+
+	// Initialize policy manager
+	l.policyManager = policy.NewWithManager(ctx, cfg.AppName, cfg.PolicyEnabled)
 	// Initialize the user interface
 	l.UserInterface()