feat: Add native Windows (x86_64) support

[Bvvvp009]

Adds native Windows (x86_64) support to the Lighter Python SDK.

Changes

• Added Windows native signer (signer-amd64.dll)
• Updated platform detection in signer_client.py
• Updated documentation with build instructions
• Enhanced .gitignore security

Platform Support

Linux x86_64 | macOS ARM64 | Windows x86_64 ✅

Binary Verification

SHA256: 2d7ce108ca85902119644d4cd79151814395990d96f635cb266b180dc8cb1fd3
Source: elliottech/lighter-go@72f51c3
Build: just prepare-windows-local

Testing

Tested on Windows 11 x86_64 - all features working

Notes

• No breaking changes
• Minimal code changes
• Binary verifiable from public source

[alexvelea]

I (or someone else) will take a look. @Bvvvp009
Thanks for all the contributions <3
We'll review the lighter-go one first.

[alexvelea]

Can we keep the debug logs, and also add one for Win as well?
I merged something about logs which we handled incorrectly in #53 and I think they should be fineish now; they help when people are having issues but IDK. I can go either way.

[Bvvvp009]

Thanks for the review, I will check and correct them.

[alexvelea]

hey @Bvvvp009, apparently I can push things on your branch, which is nice.
I've fixed the README.
If you could check if you could cross compile the darwin (mac) one since I just have a mac.

[alexvelea]

So I've updated the signers as well. I've merged a change in lighter-go which is not reflected here yet.
Because of that, all signers are changed. They should be the same as the ones from #61 but that's not merged yet -- waiting for review.

on your PR

velea:lighter/signers (windows-native-support-clean) $ git remote -v
origin  git@github.com:Bvvvp009/lighter-python.git (fetch)
origin  git@github.com:Bvvvp009/lighter-python.git (push)
velea:lighter/signers (windows-native-support-clean) $ md5 signer-*
MD5 (signer-amd64.dll) = ede210d06f236a378f6a08e9697d3fdb
MD5 (signer-amd64.so) = 352bcfa5eb64af6326e1522fbdd537c1
MD5 (signer-arm64.dylib) = 25a9b183140211a53d06cabec8d7cee7

on the #61 PR

velea:lighter/signers (devin/1760336303-read-only-auth) $ git remote -v
origin  git@github.com:elliottech/lighter-python.git (fetch)
origin  git@github.com:elliottech/lighter-python.git (push)
velea:lighter/signers (devin/1760336303-read-only-auth) $ md5 signer-*
MD5 (signer-amd64.so) = 352bcfa5eb64af6326e1522fbdd537c1
MD5 (signer-arm64.dylib) = 25a9b183140211a53d06cabec8d7cee7

[alexvelea]

I've merged this @Bvvvp009
The only thing left is the darwin cross compile.
This looks good now.
Thanks a lot for all the good work.
If you manage to cross compile darwin we can create a new PR for that, to update the docs here and add the justfile.

[Bvvvp009]

Thanks for the merge <3, I will try to add the cross compile for darwin as well.