refactor: templateFiles as dict instead of individual parameters insetTemplateFilename

[ombahiwal]

from list of issues #17

• Issue: Pass all the template files in a dictionary instead of all of them individually like here.

Changes:

• The function setTemplateFilename now takes a single templateFiles dictionary as an argument, where keys are the names of the expected filenames (like EDfilename, SEDfilename, etc.) and values are the actual filenames (e.g., 'EDtemplate', 'SEDtemplate', etc.).
• The function loops over the templateFiles dict. For each key-value pair, it processes the file similarly to how it did for individual parameters before, checking the filename extension and constructing the file path.
• By using a dict, you can easily add or remove template files without changing the function signature or adding new parameters. It's now easier to modify and extend the template setup.

[ombahiwal]

@rthedin