Error out if question prompts are used in json mode (#340)

## Changes
This PR disallows questions in json mode

## Tests
Manually and unit test
```
shreyas.goenka@THW32HFW6T job-output % bricks bundle destroy --progress-format=json
The following resources will be removed:
{
  "resource_type": "databricks_job",
  "action": "delete",
  "resource_name": "foo"
}
Error: question prompts are not supported in json mode
```

libs/cmdio/logger.go

@@ -4,6 +4,7 @@ import (
 	"bufio"
 	"context"
 	"encoding/json"
+	"fmt"
 	"io"
 	"os"
 
@@ -72,6 +73,10 @@ func Ask(ctx context.Context, question string) (bool, error) {
 }
 
 func (l *Logger) Ask(question string) (bool, error) {
+	if l.Mode == flags.ModeJson {
+		return false, fmt.Errorf("question prompts are not supported in json mode")
+	}
+
 	l.Writer.Write([]byte(question))
 	ans, err := l.Reader.ReadString('\n')
 

libs/cmdio/logger_test.go

@@ -0,0 +1,14 @@
+package cmdio
+
+import (
+	"testing"
+
+	"github.com/databricks/bricks/libs/flags"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAskFailedInJsonMode(t *testing.T) {
+	l := NewLogger(flags.ModeJson)
+	_, err := l.Ask("What is your spirit animal?")
+	assert.ErrorContains(t, err, "question prompts are not supported in json mode")
+}