Add case and alert TTPs operations

[nadouani]

The CaseEndpoint class is missing methods to:

• create a TTP (procedure)
• find a list of TTPs

client.case.create_procedure()
client.case.find_procedures()

[nadouani]

@Kamforka is this something that can reuse existing methods?

[Kamforka]

@nadouani we have the following already:

client.procedure.create_in_case()
client.procedure.create_in_alert()
client.procedure.get()  # non-generic find

We can add a generic client.procedure.find() method in the procedure endpoint and we are basically covered completely.

Or if you prefer we can replicate the above mentioned methods in the alert and case endpoints.

[nadouani]

@Kamforka it's more for consistency reasons. we have client.case.find_XYZ except for procedures. To be consistent we should add a find_procedures method

[Kamforka]

@nadouani should the below be the complete list that we need to add:

# case endpoint
client.case.create_procedure()
client.case.find_procedures()
# alert endpoint
client.alert.create_procedure()
client.alert.find_procedures()
# ttp endpoint
client.procedure.find()

?

[nadouani]

@Kamforka this list of methods looks perfect!