Doc: Adding page which lists all QML basic types.

Change-Id: I12b2a1ec3dad379bcca806f9dd74a3049b1b838c
Task-number: QTBUG-32871
Reviewed-by: Martin Smith <martin.smith@digia.com>
Doc: Make lists of QML basic types and All QML Types page consistent.

-consistent structure and also consistent with the C++ classes page.

Change-Id: I25d505c43014474a1c1caede595f047eff3a5681
Reviewed-by: Martin Smith <martin.smith@digia.com>