Bugs cause circuit compilation to fail

[Divide-By-0]

• Error: Connector not connected. when clicking 'verify' after sending on chain for the luma proof
• we should warn when we see a space after a colon in the regex definition
• when the regex fails, we should show a tooltip in the frontend on top of the X saying that i.e. regex doesnt match, or the dkim key doesnt exist (note that its maybe too or too new if we have a key for that selector but the date range doesnt overlap)
• when regex doesnt match, the idx is not generated, but it should just show an X saying that the regex doesn't match and disallow proof gen

Fixed in #14

• You cannot have just one private input, or else there will be a compile error where it tries to capture the nonexistent reveal block from the regex. Blocked in frontend for now, but ideally should be fixed in the circuit generation
• names of fields should replace spaces with underscores

Fixed in #10

• when asking for a domain in the config, disallow people to put whole emails
• Names of fields cannot have spaces

[javiersuweijie]

when regex doesnt match, the idx is not generated, but it should just show an X saying that the regex doesn't match and disallow proof gen

Fixed in: #16