[apache#5333] Add column title row to table column output in Gravitin…

…o CLI (apache#5350)

### What changes were proposed in this pull request?

Add column title row to table column output.

### Why are the changes needed?

So it's easier for a user to understand the output.

Fix: apache#5333

### Does this PR introduce _any_ user-facing change?

N/A

### How was this patch tested?

Compiled and tested locally.

clients/cli/src/main/java/org/apache/gravitino/cli/commands/ListColumns.java

@@ -68,8 +68,12 @@ public void handle() {
       String name = columns[i].name();
       String dataType = columns[i].dataType().simpleString();
       String comment = columns[i].comment();
-      String nullable = columns[i].nullable() ? "null" : "";
-      String autoIncrement = columns[i].autoIncrement() ? "auto" : "";
+      String nullable = columns[i].nullable() ? "true" : "false";
+      String autoIncrement = columns[i].autoIncrement() ? "true" : "false";
+
+      if (i == 0) {
+        all.append("name,datatype,comment,nullable,auto_increment" + System.lineSeparator());
+      }
       // TODO default values
       all.append(
           name