BHoM_Engine: Add ParseEnum method for int value and add ignoreCase option for string conversion

[FraserGreenroyd]

Fixes #3119

[FraserGreenroyd]

@BHoMBot check versioning

[bhombot-ci]

@FraserGreenroyd to confirm, the following actions are now queued:

• check versioning

[EKAdebo]

Tested this code and it works as expected. LGTM, LGTM!

[FraserGreenroyd]

@BHoMBot check compliance
@BHoMBot check core
@BHoMBot check null-handling
@BHoMBot check serialisation
@BHoMBot check installer

[bhombot-ci]

@FraserGreenroyd to confirm, the following actions are now queued:

• check code-compliance
• check documentation-compliance
• check project-compliance
• check branch-compliance
• check dataset-compliance
• check copyright-compliance
• check core
• check null-handling
• check serialisation
• check installer

There are 31 requests in the queue ahead of you.

[FraserGreenroyd]

@BHoMBot this is a DevOps instruction. I am requesting neutral checks on: versioning, unit-tests, ready-to-merge

[bhombot-ci]

@FraserGreenroyd I have provided neutral checks to the checks requested. These checks will need to be run properly to obtain full results.