Add regex examples in the documentation

[cbedetti]

It's possible to be more flexible with "searchMethod": "re"

Put example in the documentation to do thing like :

• "EchoTime": > 0.1
• "SeriesDescription": "MPRAGE" or "IR-FSPGR"

[arnaudbore]

I tried using re and the "EchoTime": > 0.1 but get a json error: json.decoder.JSONDecodeError: Expecting value: line 39 column 27 (char 1041)

Can you give a quick example here ? Thank you

[arnaudbore]

Documentation is continuously being updated so it's not an issue here. BTW: "EchoTime": > 0.1 is not possible with re