expose integers as our fixed-width integer types from chia-blockchain

[arvidn]

this makes integration of rust types (more) seamless in chia-blockchain, and greatly simplifies the patches to transition types. No longer requiring explicit casts to the fixed width integer types

[coveralls-official]

Pull Request Test Coverage Report for Build 7702177520

• -19 of 65 (70.77%) changed or added relevant lines in 6 files are covered.
• 7 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.02%) to 84.704%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
chia-protocol/src/unfinished_block.rs	0	2	0.0%
chia_py_streamable_macro/src/lib.rs	27	32	84.38%
chia-protocol/src/fullblock.rs	0	6	0.0%
chia-protocol/src/header_block.rs	0	6	0.0%

Files with Coverage Reduction	New Missed Lines	%
chia-protocol/src/unfinished_block.rs	1	32.43%
chia-protocol/src/fullblock.rs	3	16.67%
chia-protocol/src/header_block.rs	3	27.16%

Totals
Change from base Build 7655434740:	0.02%
Covered Lines:	11136
Relevant Lines:	13147

---

💛 - Coveralls

[Rigidity]

I would love to not require importing chia-blockchain anywhere in this repo, but we're already doing so. In the future I think it might be a good idea to implement the sized int types directly in Rust. But this is good for now