Allow custom checks for lines

I am submitting this code since I already use it and maybe someone else can find it useful.

I am thinking of a simple extension to allow custom regex checks for lines. multi lines regex are not supported.

In my project we mark all tech-debts with a ticket in the issue tracking system but also with a strict format comment in the code. Ex FIXME:123: . TODO or other FIXME:XXX: markers are not allowed as it is much harder to track their progress.

Also each branch name contains a ticket ID so the linter will also check fro FIXME:BRANCH_ID: and make sure all markers were removed while working on BRANCH_ID.