feat(examples): add shadcn/ui examples

[Xy2002]

Added examples for manual installation and CLI using shadcn/ui in TNF

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Latest commit: 4595f48

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[sorrycc]

1、一个 pr 只做一件事，不要既增加 example 又修改功能，不好合
2、example 不需要加 changeset
3、generate 部分需要 revert，我在 master 做了重构，全冲突了

[Xy2002]

1、一个 pr 只做一件事，不要既增加 example 又修改功能，不好合 2、example 不需要加 changeset 3、generate 部分需要 revert，我在 master 做了重构，全冲突了

好的，我重新提交pr