Many codes when computer was scanned including code P0100

WOW !
P0100 through P0104 all relate to the Mass Airflow Sensor. All of them together suggest that the wiring harness to the sensor has either come off or is shorted.
Check for that first, then check Fuse six (ten amp) and Fuse fifty three (twenty amp) and see if they are okay.

P0105 and P0106 are related to a Manifold Absolute Pressure sensor. The thing is that the books show that it does not have one so those could be false codes.

Check battery for condition including load test a bad battery or dirty terminal ends will send false codes which a few look like they are.

Two of the codes are for the maf which cleaning never helps. The others I didn't really look further than the list as they aren't listed so it may be a generic thing on the other codes. That is why I said to check battery or connections. What you might check is holes in duct work to engine that can set those codes as well

P0100 Mass or Volume Air Flow Circuit Malfunction
P0101 Mass or Volume Air Flow Circuit Range/Performance Problem
P0102 Mass or Volume Air Flow Circuit Low Input
P0103 Mass or Volume Air Flow Circuit High Input
P0104 Mass or Volume Air Flow Circuit Intermittent

The other two are MAP codes (but no MAP listed for that vehicle)
P0105 Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction
P0106 Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem

Could very well be that the MAF died internally. The only thing beyond powers and grounds will take a scan tool or an O-Scope to look at.

It can depending on how it failed. Here is a test. Disconnect the battery cables. Touch the cable ends together for 20 seconds or so to drain the power from the ECM and the rest of the modules. Reconnect the battery. Scan for codes. Should be none. Now try to start the engine. It will probably die as usual. Scan for codes again. Post those.
Some of the ones you posted are probably from you unplugging the MAF. I want to see which ones pop back up.

From your description of the strong fuel smell it sounds like it is flooding out. The MAF could cause that.

Does your scan tool allow you to view live data?

P0113 - Inlet air temperature circuit high input
P0340 - Camshaft position sensor circuit malfunction.

From all the circuit codes you need to trace the wiring harness and look for damage like rodent chewing, melted from exhaust heat, or similar. Unless the PCM itself is damaged.

At this point you may want to just throw in the towel and take it to a dealer or shop with a better scan tool. With that they can actually run tests both ways and look at the actual data the various sensors are sending the computer.

The sensor goes down through the cam cover towards the flywheel end.

Picture of sensor and test below.
Camshaft sensor test - Use a multimeter set to ohms. Check the resistance between terminals 1 and 2, then 1 and 3, then 2 and 3. Should read 0 ohms in each test.

With all the issues you have you might want a good service manual.
http://www.nicoclub.com/archives/nissan-versa-factory-service-manuals.html
has the factory ones that you can read. That would allow you to look up each code, what it means, what to test and component locations.

P0340 - Cam position sensor. Replace it and see if it starts up.

If you erased the codes it won't have any until it runs the testing routines again. Plugs being wet is common when the engine doesn't start. New ones probably won't fix it but it would be a starting point. If you feel the shop is OK then let them try.

I would replace the plugs and the MAF and see what happens.