Upgrade zig 0.12

[krichprollsch]

⚠️ This PR is on hold, see https://github.com/lightpanda-io/project/issues/97 for details

0.12.0-dev.3439+31a7f22b8
0.12.0-dev.3518+d2be725e4
0.12.1

replaces on #202
depends on lightpanda-io/zig-js-runtime#216
depends on #242

[krichprollsch]

I have multiple issues with this PR.

• C import failed

zig build test and zig build shell fail due to two different C import failed error.

• zig build test returns 'dom/dom.h' file not found
• zig build shell returns 'linenoise.h' file not found

⚠️ but zig build get and zig build wpt work correctly. I don't understand where the difference is for dom.h 🤔

• XMLHttpRequest cast error

Due to ziglang/zig#18955 I had to add a fixed buffer to XMLHttpRequest.
But in result, the issue lightpanda-io/zig-js-runtime#205 happens again....