Added support to UUID

[neetaBirajdar]

Description

• Added support to UUID type.
• Added documentation for it.

Related Issues

Closes & Solves : #223

Progress

• [x] New type created
• [x] Documentation added and updated

Pull request checklist

• [x] Tests: This PR includes tests for covering the features or bug fixes (if applicable).
• [x] Docs: This PR updates/creates the necessary documentation.
• [x] CI: Make sure your Pull Request passes all CI checks. If not, clarify the motif behind that and the action plan to solve it (may reference a ticket)

How to test it

Now the example given in #223 works as expected.

You can check via python: Note: You can find more in doctests

>>> from sgqlc.types import Type
>>> from sgqlc.types.uuid import UUID

>>> class UUIDTestType(Type):
...     uuid=UUID
... 
>>> UUIDTestType
type UUIDTestType {
  uuid: UUID
}
>>> json_data = {'uuid': UUID('94fda4fb-d574-470b-82e2-0f4ec2a2db20')}
>>> obj = UUIDTestType(json_data)
>>> obj.uuid
UUID('94fda4fb-d574-470b-82e2-0f4ec2a2db20')

Visual reference

Tested with the example given in https://github.com/profusion/sgqlc/issues/223 ( with system ) :

[coveralls]

Pull Request Test Coverage Report for Build 4284899777

• 21 of 21 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 3622975735:	0.0%
Covered Lines:	1596
Relevant Lines:	1596

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💛 - Coveralls

[barbieri]

let me know if you need this to be pip-released, it would be a release with this single commit, so if it's not urgent for you, I'll wait more stuff to queue before I do it.

[neetaBirajdar]

Thanks for merging the PR. It was fun working on it.

Please take your time, it is not urgent at the moment. :)