Adapt codebase to breaking API changes in Zig 0.16.0-dev:
std.Io introduction:
- std.io namespace renamed to std.Io (capitalization)
- std.http.Client now requires io field
- Create std.Io.Threaded at entry points, pass io to functions
- Use std.Io.Writer.fixed() for fixed buffer writers
- Use std.Io.Dir.cwd().access(io, ...) for file access checks
Sleep API:
- std.Thread.sleep / std.time.sleep removed
- Use std.posix.nanosleep(seconds, nanoseconds) instead
JSON API:
- std.json.stringify() -> std.json.Stringify.value()
Time API:
- std.time.nanoTimestamp() removed
- Use std.time.Instant.now() with .since() for durations
File API:
- readFileAlloc parameter order changed, uses std.Io.Limit
Debug API:
- std.debug.writeStackTrace signature changed (removed debugInfo)
- Capture traces by pointer with |*trace| pattern
Refactored Io pattern in tests/examples to create Threaded once
at entry points and pass io: std.Io to helper functions, following
Zig's new convention of treating Io like allocators.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
