New optional field for sites that are not bang-friendly.

[Leftium]

Is your feature request related to a problem? Please describe.
Many sites are not bang-friendly. For example:

• !copilot redirects, ignoring and stripping query params (unless the referring URL is bing.com)
• https://brew.sh does not accept url params and requires clicking to bring up its search input.

Describe the solution you'd like

• Add an optional field to the bang schema that a browser extension or user script could use to fill in fields (and optionally automatically submit.)
• The field value would be an array of [action, selector] tuples where actions are like click and fill.
• The Kagi extension could recognize this new field, saving users from having to install any extra browser extensions or user scripts.

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• An alternative solution may be to copy the search query to the clipboard when a site is flagged as not bang-friendly.
• The Kagi site could do this without any extra browser extensions or user scripts
• It may be nice to let the user know their query was copied to the clipboard, though.