feature/conn25: rename localapi.go to api.go

And rename serveStateGet to serveLocalAPIStateGet to prepare for adding
a c2n handler that is backed by the same methods as the LocalAPI
handler.

Updates tailscale/corp#40125

Signed-off-by: Michael Ben-Ami <mzb@tailscale.com>

feature/conn25/api.go

@@ -22,9 +22,9 @@ import (
 	"tailscale.com/util/testenv"
 )
 
-// serveStateGet serves the localapi endpoint /conn25-state.
+// serveLocalAPIStateGet serves the localapi endpoint /conn25-state.
 // See also [*Conn25.GetActiveState].
-func serveStateGet(h *localapi.Handler, w http.ResponseWriter, r *http.Request) {
+func serveLocalAPIStateGet(h *localapi.Handler, w http.ResponseWriter, r *http.Request) {
 	// TODO(tailscale/corp#39033): Remove for alpha release.
 	if !envknob.UseWIPCode() && !testenv.InTest() {
 		w.WriteHeader(http.StatusNotImplemented)

feature/conn25/conn25.go

@@ -85,7 +85,7 @@ func init() {
 	})
 	ipnlocal.RegisterPeerAPIHandler("/v0/connector/transit-ip", handleConnectorTransitIP)
 	ipnlocal.HookReplyToDNSQueries.Add(handleHookReplyToDNSQueries)
-	localapi.Register("conn25-state", serveStateGet)
+	localapi.Register("conn25-state", serveLocalAPIStateGet)
 }
 
 func handleConnectorTransitIP(h ipnlocal.PeerAPIHandler, w http.ResponseWriter, r *http.Request) {