refactor(split_functional_groups)

[kellijohnson-NOAA]

What is the feature?

• Split functional groups from left to right rather than right to left. This allows for all types of patterns to be matched rather than relying on a certain formatting for the grouping structure within a species.

How have you implemented the solution?

• PascalCase and camelCase words are first transformed to sentence case and leading brackets are transformed to a space and trailing brackets are removed.
• split_functional_groups() looks for common groups by searching character by character through all combinations of x.
• Words are then split between common groups and trailing information. The trailing information is the grouping and common group is the species.
• A data frame is returned (same as before).

Does the PR impact any other area of the project, maybe another repo?

• @Bai-Li-NOAA can you test this on your functional groups for the simulation project to see if I need to do any augmenting.