Added create and delete operations for projects and boards with validation and error handling

cmd/errors.go

@@ -0,0 +1,36 @@
+package cmd
+
+import (
+	"fmt"
+
+	"git.franklin.lab/steve.cliff/pcli/model"
+)
+
+// friendlyAPIError translates APIError status codes into human-readable messages with operation context.
+func friendlyAPIError(err error, operation string, permissionHint string) error {
+	if err == nil {
+		return nil
+	}
+
+	// Check if it's an APIError
+	apiErr, ok := err.(*model.APIError)
+	if !ok {
+		// Not an API error, return as-is
+		return err
+	}
+
+	switch apiErr.StatusCode {
+	case 401:
+		return fmt.Errorf("%s: authentication failed — check your API key", operation)
+	case 403:
+		if permissionHint != "" {
+			return fmt.Errorf("%s: permission denied (%s)", operation, permissionHint)
+		}
+		return fmt.Errorf("%s: permission denied", operation)
+	case 404:
+		return fmt.Errorf("%s: not found — the resource may not exist or you may not have access to it", operation)
+	default:
+		// Unknown status code, return original error
+		return err
+	}
+}