Educate about /foo when ?!.foo

[Zabuzard]

Overview

Implements and closes #654.

Adds a slash command educator that sends an advice when it sees someone posting a message command ?foo, !foo, .foo, telling them how to use slash commands /foo instead. Looks like this:

Details

The actual pattern used to match messages is:

[.!?] // Start of message command
[a-zA-Z]{2,15} // Name of message command, e.g. 'close'
.*

So it will not react on stuff like ?? or ? whats this.

Other

Also added unit tests. And got rid of a bigger code duplication with MessageReceiverAdapter where nearly every implementation wrote super(Pattern.compile(".*"));.

[sonarqubecloud]

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0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

0.0% Coverage
0.0% Duplication

[Zabuzard]

1 week, lets go