Add AS peers display to AS detail page

- Added GetASPeers method to database to fetch all peering relationships
- Updated AS detail handler to fetch and pass peers to template
- Added peers section to AS detail page showing all peer ASNs with their info
- Added peer count to the info cards at the top of the page
- Shows handle, description, and first/last seen dates for each peer

internal/database/interface.go

@@ -60,6 +60,8 @@ type Store interface {
 	// AS and prefix detail operations
 	GetASDetails(asn int) (*ASN, []LiveRoute, error)
 	GetASDetailsContext(ctx context.Context, asn int) (*ASN, []LiveRoute, error)
+	GetASPeers(asn int) ([]ASPeer, error)
+	GetASPeersContext(ctx context.Context, asn int) ([]ASPeer, error)
 	GetPrefixDetails(prefix string) ([]LiveRoute, error)
 	GetPrefixDetailsContext(ctx context.Context, prefix string) ([]LiveRoute, error)
 	GetRandomPrefixesByLength(maskLength, ipVersion, limit int) ([]LiveRoute, error)