dbc

We should add the following assertions for string, ReadOnlySpan<char> and Span<char>:

• IsTrimmed: checks if a character sequence starts and ends with a non-whitespace character, returns true or false.
• MustBeTrimmed: same as IsTrimmed, but throws a StringException.
• IsTrimmedAtStart: checks if a character sequence starts with a non-whitespace character, returns true or fals

Currently disabled until some further implementation is done, but I just want to lay some groundwork for future infrastructure.

This is a basic CodeQL workflow (GitHub Action) that will autobuild (or try to) a repositories code and scan it against a huge database of security vulnerabilities and more. Slap a cronjob on it and we're ballin outta control.

<a href="https://gitpod.io/#https://