feat: MixedChart; refactor(mod-chart): BaseChart, BaseSimpleChart; feat: add style.showLine for LineChart

[jiwangyihao]

Description:

• feat: add style.showLine for LineChart
• refactor(mod-chart): use BaseChart, BaseSimpleChart to replace utils/chartTypes
• feat: mixedChart
• refactor(mod-chart/utils): remove unnecessary class definition

Checklist:

• Code has been reviewed
• Code complies with the project's code standards and best practices
• Code has passed all tests
• Code does not affect the normal use of existing features
• Documentation has been updated

Screenshots:

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