feat: get and apply complex data from complex portal

[ae-tafur]

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Main improvements in this PR:

Solution to #160

Add two functions:

1. getComplexData.m to get curated information for complex in complex portal, and save it in a .json file.
2. applyComplexData.m which read the .json file with the complex data and apply it to populate the model.ec.rxnEnzMat field in the model. For now, I suggest to run applyComplexData after makeEcModel since it returns the proposed complex information for manual curation as suggested here

I hereby confirm that I have:

• [x] Tested my code with all requirements for running GECKO
• [ ] Selected devel3 as a target branch (top left drop-down menu)