Implement TYPE command

[kelvinmwinuka]

Implement the TYPE command, which returns the data type of the provided key.
Reference: https://redis.io/docs/latest/commands/type/

Client-Server Spec:

Command File: ./internal/modules/generic/commands.go
Test File: ./internal/modules/generic/commands_test.go

Command: type
Module: constants.GenericModule
Categories: constants.KeyspaceCategory, constants.ReadCategory, constants.FastCategory
Description: (TYPE key) Returns the string representation of the type of the value stored at key. The different types that can be returned are: string, integer, float, list, set, zset, hash and stream.
Sync: false

Embedded Spec:

Command File: ./echovault/api_generic.go
Test File: ./echovault/api_generic_test.go