refactor: move compose and deploy packages under client

pkg/client/compose/project.go

@@ -0,0 +1,39 @@
+package compose
+
+// TODO: make compose, cli, and api packages public.
+
+import (
+	"context"
+	"fmt"
+	composecli "github.com/compose-spec/compose-go/v2/cli"
+	"github.com/compose-spec/compose-go/v2/types"
+)
+
+func LoadProject(ctx context.Context, paths []string) (*types.Project, error) {
+	options, err := composecli.NewProjectOptions(
+		paths,
+		// First apply os.Environment, always wins.
+		composecli.WithOsEnv,
+		// Read dot env file to populate project environment.
+		composecli.WithDotEnv,
+		// Get compose file path set by COMPOSE_FILE.
+		composecli.WithConfigFileEnv,
+		// If none was selected, get default compose.yaml file from current dir or parent folders.
+		composecli.WithDefaultConfigPath,
+		composecli.WithExtension(PortsExtensionKey, PortsSource{}),
+	)
+	if err != nil {
+		return nil, fmt.Errorf("create compose parser options: %w", err)
+	}
+
+	project, err := options.LoadProject(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	if project, err = transformServicesPortsExtension(project); err != nil {
+		return nil, err
+	}
+
+	return project, nil
+}