Remove spider functionality and related configurations

- Deleted the spider package and its associated functionality from the main application.
- Removed references to spider mode and frequency from configuration files and documentation.
- Updated the main application to eliminate spider initialization and related logic.
- Cleaned up import statements and configuration options to reflect the removal of spider features.

app/config/config.go

@@ -44,14 +44,12 @@ type C struct {
 	Owners              []string      `env:"ORLY_OWNERS" usage:"comma-separated list of owner npubs, who have full control of the relay for wipe and restart and other functions"`
 	ACLMode             string        `env:"ORLY_ACL_MODE" usage:"ACL mode: follows, managed (nip-86), none" default:"none"`
 	AuthRequired        bool          `env:"ORLY_AUTH_REQUIRED" usage:"require authentication for all requests (works with managed ACL)" default:"false"`
-	SpiderMode          string        `env:"ORLY_SPIDER_MODE" usage:"spider mode: none,follows" default:"none"`
-	SpiderFrequency     time.Duration `env:"ORLY_SPIDER_FREQUENCY" usage:"spider frequency in seconds" default:"1h"`
 	BootstrapRelays     []string      `env:"ORLY_BOOTSTRAP_RELAYS" usage:"comma-separated list of bootstrap relay URLs for initial sync"`
 	NWCUri              string        `env:"ORLY_NWC_URI" usage:"NWC (Nostr Wallet Connect) connection string for Lightning payments"`
 	SubscriptionEnabled bool          `env:"ORLY_SUBSCRIPTION_ENABLED" default:"false" usage:"enable subscription-based access control requiring payment for non-directory events"`
 	MonthlyPriceSats    int64         `env:"ORLY_MONTHLY_PRICE_SATS" default:"6000" usage:"price in satoshis for one month subscription (default ~$2 USD)"`
 	RelayURL            string        `env:"ORLY_RELAY_URL" usage:"base URL for the relay dashboard (e.g., https://relay.example.com)"`
-	RelayAddresses      []string      `env:"ORLY_RELAY_ADDRESSES" usage:"comma-separated list of websocket addresses for this relay (e.g., wss://relay.example.com,wss://backup.example.com) - used by spider to avoid self-connections"`
+	RelayAddresses      []string      `env:"ORLY_RELAY_ADDRESSES" usage:"comma-separated list of websocket addresses for this relay (e.g., wss://relay.example.com,wss://backup.example.com)"`
 	FollowListFrequency time.Duration `env:"ORLY_FOLLOW_LIST_FREQUENCY" usage:"how often to fetch admin follow lists (default: 1h)" default:"1h"`
 
 	// Web UI and dev mode settings