Refactored int primitives with BigInt support and bounds checking

[chavic]

Refactored int primitives with BigInt support and bounds checking

• extended impl_renderable_for_primitive! with a bounds-checking variant (7 params); kept 4-param path for non-bounded types.
• type_limits (29 tests) all passed.
• Added BigInt support for larger Int types

[DanGould]

Hey Chavic, nice to wake up to pushes today. is there rationale for why these changes were made and for why you chose the approach you did?

[chavic]

Hey Chavic, nice to wake up to pushes today. is there rationale for why these changes were made and for why you chose the approach you did?

the tldr:
The biggest reason is to get the type_limits fixture test to pass it fully. Earlier, I did a round on what was needed for stability... this fixture was key for a few reasons... The biggest one is maintaining precision and correctness across platforms. I also caught a few bugs along the way which I infered where caused by possible truncation, and sign reversing for unsigned ints

[spacebear21]

Similarly to my comment on #82, this PR doesn't need the first two commits which are unrelated to the purpose of this PR. Additionally I would modify the ordering of the changes as such:

• first commit adds BigInt support (5820b7d)
• second commit combines 407a700 and fc220ea to support type boundaries.
• third commit enables the type limit fixture. Adding this last ensures that CI stays green throughout every commit and tools like git bisect are effective.

[davidcaseria]

I'm trying to generate Dart bindings for CDK and I'm running into RangeError issues. I'm not totally sure what the cause is, but it seems likely that it has something to do with using u64. Are these fixes still planned to be merged?

[chavic]

@davidcaseria, yeah, actively working on fixes...
One check, have to verify this PR contains the fix you need...

Have you done that already?

[chavic]

I moved some of these changes/fixes to a newer PR #95

[davidcaseria]

I'm still testing this. I think it fixes one issue, but there are still other issues I'm trying to troubleshoot.