feat: enhance TypeScript declaration generation

[kuoruan]

Description

This PR allows the user:

• generate multiple dts files
• ignore declaration generate for some components or directives.

Linked Issues

No

Additional context

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[kuoruan]

@antfu Can you please review this?

[antfu]

What's the reason you want it to generate multiple files? I am not sure if the complexity here is worth it

[kuoruan]

@antfu The main purpose is to ignore definition for some components.
For example, some component libraries (like naive-ui or unplugin-icons) already provide d.ts files, but since unplugin-vue-components doesn't have a way to ignore it. The components.d.ts file will always be changed when collaborating on a project, which can easily cause conflicts.