[client] Extract peer status recorder into its own package

Move the Status recorder and its state types out of the peer package
into client/internal/peer/status, split by struct across recorder.go,
peer_state.go, full_status.go, events.go, notifier.go and route.go
instead of one 1600-line file. Rename the type Status -> Recorder
(NewRecorder already implied it; avoids status.Status stutter). Split
conn_status.go: the ConnStatus type and its constants move to the status
package, connStatusInputs stays with the peer event loop.

The peer package references the status package directly; a transitional
status_alias.go re-exports the moved symbols for the ~50 external callers
still using peer.Status/State/ConnStatus, to be removed once they are
migrated.

client/internal/peer/conn_test.go

@@ -15,6 +15,7 @@ import (
 	"github.com/netbirdio/netbird/client/iface"
 	"github.com/netbirdio/netbird/client/internal/peer/guard"
 	"github.com/netbirdio/netbird/client/internal/peer/ice"
+	"github.com/netbirdio/netbird/client/internal/peer/status"
 	"github.com/netbirdio/netbird/client/internal/stdnet"
 	"github.com/netbirdio/netbird/util"
 )
@@ -69,7 +70,7 @@ func TestConn_GetKey(t *testing.T) {
 func TestConn_DiscardMessagesWhenNotOpened(t *testing.T) {
 	swWatcher := guard.NewSRWatcher(nil, nil, nil, connConf.ICEConfig)
 	sd := ServiceDependencies{
-		StatusRecorder: NewRecorder("https://mgm"),
+		StatusRecorder: status.NewRecorder("https://mgm"),
 		SrWatcher:      swWatcher,
 	}
 	conn, err := NewConn(connConf, sd)