Detect conserved words in GECKO3 and gives a warning when they are occupied in the basic GEM

[feiranl]

Expected behavior:

Mets in the basic model starting with conserved words such as 'prot_' should be detected at the beginning of makeEcModel and gives a warning.

I hereby confirm that I have:

• [ ] Tested my code with all requirements for running GECKO
• [ ] Done this analysis in the master branch of the repository
• [ ] Checked that a similar issue does not exist already