Adding migration process equivalent to Stock Synthesis 3

[SamikDatta]

• Please check that the PR fulfills these requirements

• The commit message follows the Contributor Guidelines
• Tests for the changes have been added (for bug fixes / features)
• Documents have been added / updated (for bug fixes / features)

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

Adds the process MigrationSS3 which allows migration to occur. Unit test included.

• What is the current behavior? (You can also link to an open issue here)

No process exists

• What is the new behavior (if this is a feature change)?

Allows runs with migration to compare to Stock Synthesis 3

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

No.

• Other information:

[SamikDatta]

Migration process now added successfully.

[Zaita]

Hi @SamikDatta
Can you please add the relevant information to the User Manual for this new process?

[SamikDatta]

Hi @Zaita, just getting around to this now (apologies, I was on holiday when you sent this). Can I double check if the user manual will scrape text for the section automatically from somewhere, or if I just edit the LaTeX file Population.tex directly? Either way this will just take me a few minutes, will do it when I hear from you.

[Zaita]

@SamikDatta No. It only scrapes the constructor for parameters to build the syntax section.