feat: hide NFS option on Windows and refactor NFS implementation for build tagging

internal/protocols/nfs/nfs_unix.go

@@ -1,3 +1,5 @@
+//go:build !windows
+
 package nfs
 
 import (

internal/protocols/nfs/nfs_windows.go

@@ -0,0 +1,27 @@
+//go:build windows
+
+package nfs
+
+import (
+	"fmt"
+	"io"
+
+	"goexplore/internal/config"
+	"goexplore/internal/explorer"
+)
+
+type NFSExplorer struct{}
+
+func New(c *config.ConnectionConfig, secret string) (*NFSExplorer, error) {
+	return nil, fmt.Errorf("NFS is not supported on Windows")
+}
+
+func (e *NFSExplorer) Connect() error { return nil }
+func (e *NFSExplorer) Disconnect() error { return nil }
+func (e *NFSExplorer) ListDir(path string) ([]explorer.FileEntry, error) { return nil, nil }
+func (e *NFSExplorer) Stat(path string) (explorer.FileEntry, error) { return explorer.FileEntry{}, nil }
+func (e *NFSExplorer) MkDir(path string) error { return nil }
+func (e *NFSExplorer) Delete(path string) error { return nil }
+func (e *NFSExplorer) Rename(src, dst string) error { return nil }
+func (e *NFSExplorer) ReadFile(path string) (io.ReadCloser, error) { return nil, nil }
+func (e *NFSExplorer) WriteFile(path string, r io.Reader, size int64) error { return nil }