Add block-wise options

[zalenskivolt]

see IANA CoAP Option Numbers

#	Option	RFC
19	Q-Block1	[RFC9177 Block-Wise robust]
23	Block2	[RFC7959 Block-Wise][RFC8323 TLS+][RFC8613 OSCORE]
27	Block1	[RFC7959 Block-Wise][RFC8323 TLS+][RFC8613 OSCORE]
28	Size2	[RFC7959 Block-Wise][RFC8613 OSCORE]
31	Q-Block2	[RFC9177 Block-Wise robust]
(60	Size1)	[RFC7252 CoAP][RFC8613 OSCORE]

(Size1 was already implemented, some tests added)

TLS+ = TCP, TLS, and WebSockets

[codecov]

Codecov Report

Attention: Patch coverage is 73.17073% with 22 lines in your changes missing coverage. Please review.

Project coverage is 63.95%. Comparing base (74fdfac) to head (0cdb249).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
koap-core/src/commonMain/kotlin/Block.kt	47.61%	8 Missing and 3 partials ⚠️
koap-core/src/commonMain/kotlin/Message.kt	78.43%	5 Missing and 6 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #335      +/-   ##
==========================================
+ Coverage   61.72%   63.95%   +2.22%     
==========================================
  Files           8        9       +1     
  Lines         695      774      +79     
  Branches      156      172      +16     
==========================================
+ Hits          429      495      +66     
- Misses        215      220       +5     
- Partials       51       59       +8     

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[zalenski]

when you have a chance, can you rebase/fix conflicts? TY!

@twyatt rebased & fixed

[twyatt]

@zalenskivolt I pushed a couple commits to restructure things a little.

I changed the size to an enum to enforce only specific sizes, but I'm not sure if it is the best approach (the enum naming is awkward) but it does provide better compile-time safety. 🤷

Let me know what you think.

[sdonn3]

Very clean, tested and well documented, I love it!