add text search to /collections html page

[hrodmn]

The new browser-like capabilities in the STAC endpoints are capable of using more than just the limit query parameter! This just adds a free-text search to the /collections HTML page. We could add bbox and datetime but the layout could get pretty crowded so I just added text search for now.

[oliverroick]

This is great, I was thinking of doing something along the same lines.

We could add bbox and datetime but the layout could get pretty crowded so I just added text search for now.

We could add an “advance search” for more detailed search options, ie. placing the form inputs for bbox and datetime in a collapsible that is hidden by default.

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I’ve added two small changes:

• The label placement in the flex row looked a bit off, so I re-arranged the elements a little to address that.
• Being a little pedantic here: In the spirit of progressive enhancement, I registered submitSearch as a handler for the submit event, rather than using the onsubmit attribute.

[hrodmn]

@oliverroick thanks for your help clarifying the html for this feature - html is not my native language.

We could add bbox and datetime but the layout could get pretty crowded so I just added text search for now.

We could add an “advance search” for more detailed search options, ie. placing the form inputs for bbox and datetime in a collapsible that is hidden by default.

That would be cool! Should we add that in this PR or in a separate one?