`web` generator should not render the search bar if `orama-db` is not enabled

[bmuenzenmeyer]

Enter your suggestions in details:

When exploring getting started experiences within #889 - I noticed that if you only generate with web, we still by default render the search bar, yet it does nothing.

The best experience would be to only render that if orama-db is also set.

[avivkeller]

There are cases where we want a search bar to render even without orama-db, for instance, if you want multiple doc-kit instances to rely on the same database for search.

Perhaps make this toggleable showSearchBar: userSuppliedValue ??isOramaDbSet