Updated to zig 0.15.1 and zli 4.1.0

[xcaeser]

Update the build process for clarity and improve memory management across various modules. Adjustments include changing the minimum Zig version, refining output handling, and ensuring consistent use of allocators in tests and structures.

[xcaeser]

• I updated the code to 0.15.1, some major breakage i had to work through in the arraylists and http.client.

• zli updated to 4.1.0 => read here https://github.com/xcaeser/zli/releases/tag/v4.1.0

• still an issue on upload, fast-cli -u, i let you fix that :)

• in build.zig, i commented out the tests, i let you work through them, otherwise no fun in that :)

• don't forget to update the fast-cli version

[mikkelam]

• I updated the code to 0.15.1, some major breakage i had to work through in the arraylists and http.client.

  • zli updated to 4.1.0 => read here https://github.com/xcaeser/zli/releases/tag/v4.1.0

  • still an issue on upload, fast-cli -u, i let you fix that :)

  • in build.zig, i commented out the tests, i let you work through them, otherwise no fun in that :)

  • don't forget to update the fast-cli version

Thanks a lot bro❤️ I'll look into the issues 🙏

[Copilot]

Pull Request Overview

This PR updates the project to use Zig 0.15.1 and zli 4.1.0, requiring significant API changes throughout the codebase to accommodate breaking changes in these versions.

• Updates minimum Zig version requirement and zli dependency
• Migrates from deprecated std.time.sleep to std.Thread.sleep
• Adapts to new HTTP client API and ArrayList/Writer interfaces
• Updates CLI framework integration with new zli API structure

Reviewed Changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
build.zig.zon	Updates minimum Zig version to 0.15.1 and zli dependency to 4.1.0
build.zig	Comments out library tests and updates executable configuration structure
src/main.zig	Adds writer interface for CLI output handling
src/cli/root.zig	Updates CLI command initialization and removes logging in favor of spinner output
src/lib/workers/speed_worker.zig	Migrates sleep calls and HTTP client response handling
src/lib/measurement_strategy.zig	Updates ArrayList initialization and memory management
src/lib/http_speed_tester_v2.zig	Migrates sleep function calls
src/lib/http_latency_tester.zig	Updates HTTP request API and ArrayList handling
src/lib/fast.zig	Updates HTTP client and ArrayList API usage
src/lib/bandwidth.zig	Migrates sleep function calls in tests

Comments suppressed due to low confidence (1)

src/lib/workers/speed_worker.zig:1

• The type std.Io.Writer.Allocating does not exist in Zig's standard library. This should likely be std.ArrayList(u8).init(allocator) or use the appropriate writer type from the standard library.

const std = @import("std");

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