docs(examples): add Vue 3 example

[francoischalifour]

Description

This adds an example using Vue 3. It'll be a good boilerplate for Vue users, and we'll be able to better track regressions for Vue 3 use cases.

Considerations

Vue 3 accepts lower-case event names so we need to transform props like onMouseMove to onMousemove. I created a createElement adaptor user-land to support these props.

Once these frameworks mature more in the future, we could provide these adaptors for major frameworks.

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Sandbox	Source
@algolia/autocomplete-example-github-repositories-custom-plugin	Configuration
@algolia/autocomplete-example-instantsearch	Configuration
@algolia/autocomplete-example-multiple-datasets-with-headers	Configuration
@algolia/autocomplete-example-playground	Configuration
@algolia/autocomplete-example-preview-panel-in-modal	Configuration
@algolia/autocomplete-example-query-suggestion-with-categories	Configuration
@algolia/autocomplete-example-query-suggestions-with-hits	Configuration
@algolia/autocomplete-example-query-suggestions-with-inline-categories	Configuration
@algolia/autocomplete-example-query-suggestions-with-recent-searches-and-categories	Configuration
@algolia/autocomplete-example-query-suggestions-with-recent-searches	Configuration