docs: additional notes on `globs` and `exclude`

[Kanade-Lu]

Description

match file to exclude in components.d.ts was fixed by https://github.com/unplugin/unplugin-vue-components/pull/645 but i can't find any explanation in docs, this PR just to replenish it

Linked Issues

• resolve https://github.com/unplugin/unplugin-vue-components/issues/751
• resolve https://github.com/unplugin/unplugin-vue-components/issues/617
• resolve https://github.com/unplugin/unplugin-vue-components/issues/748
• resolve https://github.com/unplugin/unplugin-vue-components/issues/420

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