feat(color-picker): add eyedropper API - #2667
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🤔 这个 PR 的性质是？
🔗 相关 Issue
#2568
🔗 相关pr
Tencent/tdesign-vue-next#6823
💡 需求背景和解决方案
ColorPicker 目前只能通过面板手动调整颜色。业务中存在上传背景图后，需要直接从图片或页面中吸取颜色的场景，因此需要支持吸色能力。
解决方案
新增 ColorPicker 吸色公共能力：
EyeDropper API。{ mode: 'fallback' }时，在不支持原生 API 的浏览器中使用html2canvas-pro截取当前页面并读取 canvas 像素。结果展示
📝 更新日志
fix(组件名称): 处理问题或特性描述 ...
本条 PR 不需要纳入 Changelog
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