feat: Implement RawStream for more types

[DaniPopes]

Closes #220.

Implements RawStream (and the other required traits) for &mut impl RawStream, Box<impl RawStream>, dyn std::io::Write {,+ Send {,+ Sync}}.

[epage]

This is doing a lot at once and is making it harder to track what is or isn't a breakin change (or even what all is changing.

Could you split this up into more commits?

[coveralls]

Pull Request Test Coverage Report for Build 11499301620

Details

• 2 of 15 (13.33%) changed or added relevant lines in 3 files are covered.
• 4 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.6%) to 52.516%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
crates/anstyle-wincon/src/ansi.rs	0	1	0.0%
crates/anstyle-wincon/src/stream.rs	0	4	0.0%
crates/anstream/src/stream.rs	2	10	20.0%

Files with Coverage Reduction	New Missed Lines	%
crates/anstyle-wincon/src/stream.rs	2	0.0%
crates/anstream/src/stream.rs	2	19.23%

Totals
Change from base Build 11282311767:	0.6%
Covered Lines:	1221
Relevant Lines:	2325

---

💛 - Coveralls

[DaniPopes]

It should be better now, can you check again? The main diff is that all the manual &mut _ and Box<_> implementations are removed for the generic ones.
The diff for RawStream is the same for the other traits.

[epage]

I don't see this having been changed from doing multiple things. e.g. this has new inlining, switching from &<trait> to &T blanket impls, etc.

[epage]

Might be fastest to focus on the impls you need and splitting out clean up into their own Prs.

[DaniPopes]

OK, I'll split this into more PRs.

[epage]

Thanks! That made it much easier to look through