windows native messaging fixes

- write to the correct registry key (it needs to be a subkey rather than a string value)
- fix the executable to be 'granted', rather than 'assumego.exe' (assumego.exe was not working)

pkg/chromemsg/configure_windows.go

@@ -39,7 +39,13 @@ func configureWindows() error {
 		}
 		defer key.Close()
 
-		if err = key.SetStringValue("io.commonfate.granted", manifestPath); err != nil {
+		gkey, _, err := registry.CreateKey(key, "io.commonfate.granted", registry.QUERY_VALUE|registry.SET_VALUE)
+		if err != nil {
+			continue
+		}
+		defer gkey.Close()
+
+		if err = gkey.SetStringValue("", manifestPath); err != nil {
 			return err
 		}
 	}

pkg/chromemsg/write_manifest.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"runtime"
 
 	"github.com/common-fate/granted/internal/build"
 )
@@ -28,6 +29,12 @@ func writeManifest(manifestPath string) error {
 		return err
 	}
 
+	if runtime.GOOS == "windows" {
+		// on windows, the file needs to be 'granted.exe' rather than 'assumego.exe'.
+		parent := filepath.Dir(executablePath)
+		executablePath = filepath.Join(parent, build.GrantedBinaryName()+".exe")
+	}
+
 	manifest := HostManifest{
 		Name:        "io.commonfate.granted",
 		Description: "Granted BrowserSupport",