Add copyright 2026 headers for source code

[dblnz]

Description

This PR adds copyright headers for hyperlight-js source code

A couple of remarks:

• Added CI check for license headers
• Test files are included
• I added 2026 copyright
• Are there other files that need to contain the headers?

[simongdavies]

LGTM, maybe we should add a PR check to ensure that the header is present in all new/updated files, that will prevent this reoccurring, I think we have one in hyperlight.

[simongdavies]

The only question I have is about teh c stubds, maybe @jprendes knows the origin of those

[jsturtevant]

LGTM, maybe we should add a PR check to ensure that the header is present in all new/updated files, that will prevent this reoccurring, I think we have one in hyperlight.

https://github.com/hyperlight-dev/hyperlight/blob/main/dev/check-license-headers.sh

2026 is correct for this since they just got released

[jprendes]

The only question I have is about teh c stubds, maybe @jprendes knows the origin of those

The stubs are ours, except for the __secs_to_tm function, which is part of musl:
https://git.musl-libc.org/cgit/musl/tree/src/time/__secs_to_tm.c

I realise we should aknowledge that somewhere, or rewrite it without basing it on musl.

I think the right thing to do is to split __secs_to_tm into its own file, with the correct license and notice, and put the header for the rest of localtime_r.

[jprendes]

I'll rewrite all the stubs in rust, I propose you go ahead as it is, as the concern with the stub will be sorted with the rewrite

[dblnz]

I'll rewrite all the stubs in rust, I propose you go ahead as it is, as the concern with the stub will be sorted with the rewrite

I've updated to remove the stub file containing the musl function