[IMP] playground: add a new sample

[jpp-odoo]

No description provided.

[ged-odoo]

<div class="board-row" t-foreach="[0,1,2]" t-as="i" t-key="i">
    <Square value="props.squares[3*i]" onSquareClick="() => this.handleClick(3*i)" />
    <Square value="props.squares[3*i+1]" onSquareClick="() => this.handleClick(3*i+1)" />
    <Square value="props.squares[3*i+2]" onSquareClick="() => this.handleClick(3*i+2)" />
</div>

or maybe:

<div class="board-row" t-foreach="[0,1,2]" t-as="i" t-key="i">
  <t t-foreach="[0,1,2]" t-as="j" t-key="j">
     <Square value="props.squares[3*i + j]" onSquareClick="() => this.handleClick(3*i+j)" />
  </t>
</div>