Update read example

[oruebel]

#118 fixed several issues with read so this PR updates the read example to resolve a few items that were marked as TODO in the example that are now working.

[oruebel]

Changed the base branch to #128 temporarily to see if the changes there fix the issues here. We can change back to target #85 again later.

[oruebel]

Ok, I finally figured out the Windows issue. The problem was that the espath used for reading was determined in this loop:

aqnwb/tests/examples/test_ecephys_data_read.cpp

Lines 203 to 208 in 14a825c

	// Print the path and type of the found objects
	for (const auto& pair : found_electrical_series) {
	std::cout << "Path=" << pair.first << " Full type=" << pair.second
	<< std::endl;
	esdata_path = pair.first;
	}

On Windows the order of paths is different and so the wrong ElectricalSeries was used, and since the size of the two series was different this led to an out-of-bounds error.

[oruebel]

@stephprince this PR is now also ready for review

[oruebel]

@stephprince I merged with #85 just so that I can finalize things there