Custom data type and routing for GRPC

[nicosammito]

Create data structure for custom data types based on the first planning of the DBML structure and develop endpoint for Aquila to push data types from runtime and actions to the database.

We will support those types of custom data types:

• PRIMITIVE
• TYPE
• OBJECT
• DATATYPE
• FUNCTION

PRIMITIVE are data types that are natively developed such as boolean or string
TYPE are data types that extend from PRIMITIVE and add rules to minimise their scope (e.g. email)
OBJECT are data types that bundle together different other data types within a key value system
DATATYPE is a data type that itself is a data type and is used for parameters and inputs that expect the data type itself rather than a value of that type
FUNCTION is a data type similar to JAVA function (Supplier, Function, Consumer) and is needed e.g. for Loops

[Taucher2003]

Currently blocked by code0-tech/tucana#9 and code0-tech/tucana#10

[nicosammito]

Currently blocked by code0-tech/tucana#9 and code0-tech/tucana#10

Should we than reset the focus for the sprint?