corrected version of the gwyddion.py (syntax error checked) and changing the output of the IgorIBWReader to a dictionary.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 84.61538% with 4 lines in your changes missing coverage. Please review.

Project coverage is 60.02%. Comparing base (001506b) to head (7ce41ac). Report is 3 commits behind head on main.

Files	Patch %	Lines
...ciFiReaders/readers/microscopy/spm/afm/gwyddion.py	0.00%	4 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #134 +/- ## ========================================== - Coverage 60.07% 60.02% -0.06% ========================================== Files 51 51 Lines 4223 4235 +12 ========================================== + Hits 2537 2542 +5 - Misses 1686 1693 +7 ``` | [Flag](https://app.codecov.io/gh/pycroscopy/SciFiReaders/pull/134/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pycroscopy) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/pycroscopy/SciFiReaders/pull/134/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pycroscopy) | `60.02% <84.61%> (-0.06%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pycroscopy#carryforward-flags-in-the-pull-request-comment) to find out more.

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