feat: add corners for BoxShadow

[18202781743]

We need to set Corners for shadows, which is same as DRoundRectangle.
TODO: support to set Corners for Shadow image, and updating it's cache png.

[deepin-bot]

Doc Check bot
🟡 some documents missing!

File	Line	Symbol
src/private/dqmlglobalobject_p.h	207	DGuiApplicationHelper::ColorType Dtk::Quick::DQMLGlobalObject::toColorType
src/private/dqmlglobalobject_p.h	208	QColor Dtk::Quick::DQMLGlobalObject::selectColor
src/private/dqmlglobalobject_p.h	210	QString Dtk::Quick::DQMLGlobalObject::deepinWebsiteName
src/private/dqmlglobalobject_p.h	211	QString Dtk::Quick::DQMLGlobalObject::deepinWebsiteLink
src/private/dqmlglobalobject_p.h	212	QString Dtk::Quick::DQMLGlobalObject::deepinDistributionOrgLogo
src/private/dqmlglobalobject_p.h	214	QPoint Dtk::Quick::DQMLGlobalObject::cursorPosition
src/private/dquickimageprovider_p.h	52	qreal Dtk::Quick::DQuickShadowProvider::ShadowConfig::spread
src/private/dquickimageprovider_p.h	53	qreal Dtk::Quick::DQuickShadowProvider::ShadowConfig::boxSize
src/private/dquickimageprovider_p.h	55	Dtk::Quick::DQuickShadowProvider::ShadowConfig::ShadowConfig
src/private/dquickimageprovider_p.h	56	Dtk::Quick::DQuickShadowProvider::ShadowConfig::ShadowConfig
src/private/dquickimageprovider_p.h	66	bool Dtk::Quick::DQuickShadowProvider::ShadowConfig::isInner
src/private/dquickimageprovider_p.h	66	bool Dtk::Quick::DQuickShadowProvider::ShadowConfig::isInner
src/private/dquickimageprovider_p.h	70	QString Dtk::Quick::DQuickShadowProvider::ShadowConfig::toString
src/private/dquickimageprovider_p.h	88	bool Dtk::Quick::DQuickShadowProvider::ShadowConfig::operator==
src/private/dquickimageprovider_p.h	98	bool Dtk::Quick::DQuickShadowProvider::ShadowConfig::operator!=
src/private/dquickimageprovider_p.h	98	bool Dtk::Quick::DQuickShadowProvider::ShadowConfig::operator!=
src/private/dquickimageprovider_p.h	102	Q_CORE_EXPORT uint qHash

[deepin-bot]

TAG Bot

New tag: 5.6.25
DISTRIBUTION: unstable
Suggest: synchronizing this PR through rebase #293

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: 18202781743, zccrs

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