Added Table, TableItem & ErrorPrompt

[KRTirtho]

Fixes#269

Added New Components:

• Table (inherits QTableWidget)
• TableItem (inherits QTableWidgetItem)
• ErrorPrompt (inherits QErrorMessage)

Guidelines about Table are documented as comments & example are also shown via doc strings

Example (Table & TableItem):

functionTableExample(){return(<TablecellRange={{row: 2,column: 2}}// 2 x 2 = 4 cells totalstyle="flex: 1;"horizontalHeaderLabels={["What","How","When"]}verticalHeaderLabels={["yes","this","later"]}hideRows={[0]}//hides the very first rowhideColumns={[1]}//hides the second column><TableItemcellPosition={[0,0]}text="1"toolTip="Tooltip"/><TableItemcellPosition={[0,1]}text="2"/><TableItemcellPosition={[1,0]}text="3"/><TableItemcellPosition={[1,1]}// position tuple [row, column]text="4"//makes the table item non-editable, non-selectable & only checkable//Focus on the "Bitwise OR (|)" operatorflags={ItemFlag.ItemIsEnabled|ItemFlag.ItemIsUserCheckable}/></Table>)}

Also added warnings if wrong index was supplied for any row/column related prop

QErrorMessage is also a kind of dialog but for name I couldn't understand its a Dialog. The React wrapper for this is called ErrorPrompt. This one works same as Dialog | FileDialog | ColorDialog etc..
Works only if was wrapped/added as a child of View | BoxView just like all other Dialogs

Thanks @a7ul

[a7ul]

Thank you @KRTirtho