Feature Extract pragmas

[francisluz]

🗒️ Description
As a detect-secrets-server user, I would like to extract all pragmas in my codebase where I can validate the use of pragma: allowlist secrets.

💡 Solution
Using the current process that loop through the code and plugin, one more step was added to extract the pragmas. This is an optional feature where on the server side will be triggered through a new flag called --extract-pragmas.

⌛ Time complexity
The performance impact on the scan if this feature is enabled, will be O(n+1) where extract-pragmas is considered an extra plugin run.

🔴 Unit Test
There are unit tests failing that I didn't manage to fix yet, as it was there already.

😎 Hope you guys like this feature, we're already using it in our internal CI process.
👍 Feel free to reach me out.