build: add app qcheckers

[mhc2910463910]

QCheckers is a Qt-based checkers board game.

Log: add app QCheckers

[deepin-ci-robot]

Hi @mhc2910463910. Thanks for your PR.

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[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: kamiyadm, mhc2910463910

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