Consistent list annotation

[Hemant27031999]

This PR is solving issue #736 and #706. A new function _fix_annotation() has been added which fixes the incorrect annotation format.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 86.20690% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 84.45%. Comparing base (d362f51) to head (351d5c3).
⚠️ Report is 868 commits behind head on devel.

Files with missing lines	Patch %	Lines
cobra/io/dict.py	83.33%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            devel     #959      +/-   ##
==========================================
- Coverage   84.63%   84.45%   -0.18%     
==========================================
  Files          50       50              
  Lines        4438     4459      +21     
  Branches      998     1006       +8     
==========================================
+ Hits         3756     3766      +10     
- Misses        441      449       +8     
- Partials      241      244       +3     

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[Midnighter]

Hey @Hemant27031999, this is good work but unfortunately, I don't think we can merge it without a change to the JSON schema. As you can read in #967, I would love to refactor this functionality into a separate package. And even if we don't do that, I think the JSON schema should be generated from pydantic models rather than crafted by hand. So I'm afraid, I can't merge this PR at this point as it is blocked.