CU-86drpncy1 - Add new methods on storage to get/put primitive values without the need of TypeHelper

[meevee98]

Summary or solution description
Implemented typed get and put storage methods to handle storage data with less verbosity

How to Reproduce

neo3-boa/boa3_test/examples/nep17.py

Lines 236 to 238 in 0612b9a

	storage.put_int(SUPPLY_KEY, TOKEN_TOTAL_SUPPLY)
	storage.put_uint160(OWNER_KEY, container.sender)
	storage.put_int(container.sender, TOKEN_TOTAL_SUPPLY)

neo3-boa/boa3_test/examples/htlc.py

Lines 145 to 153 in 0612b9a

	if not storage.get_bool(NOT_INITIALIZED):
	# Used to check if the one who's transferring to this contract is the PERSON_A
	address = storage.get_uint160(ADDRESS_PREFIX + PERSON_A)
	# Used to check if PERSON_A has already transferred to this smart contract
	funded_crypto = storage.get_int(FUNDED_PREFIX + PERSON_A)
	# Used to check if PERSON_A is transferring the correct amount
	amount_crypto = storage.get_int(AMOUNT_PREFIX + PERSON_A)
	# Used to check if PERSON_A is transferring the correct token
	token_crypto = storage.get_uint160(TOKEN_PREFIX + PERSON_A)

[melanke]

Task linked: CU-86drpncy1 Add new methods on storage to get/put primitive values without the need of TypeHelper

[coveralls]

coverage: 91.947% (+0.002%) from 91.945%
when pulling 2a45b5b on CU-86drpncy1
into d15ecaf on development.