Add automatic retry for failed tool downloads

[mondeja]

Sometimes the tools fail to download and Trunk displays an error message like

2025-10-14T09:35:51.892671Z  INFO downloading wasm-bindgen version="0.2.104"
2025-10-14T09:35:51.997188Z  INFO installing wasm-bindgen
2025-10-14T09:35:52.792645Z  INFO downloading wasm-opt version="version_123"
2025-10-14T09:35:57.809746Z ERROR ❌ error
error from build pipeline

Caused by:
    0: HTML build pipeline failed (1 errors), showing first
    1: error from asset pipeline
    2: running wasm-opt
    3: failed downloading release archive
    4: error sending HTTP request
    5: error sending request for url (https://github.com/WebAssembly/binaryen/releases/download/version_123/binaryen-version_123-x86_64-linux.tar.gz)
    6: client error (Connect)
    7: dns error: failed to lookup address information: Try again
    8: failed to lookup address information: Try again

Instead of suggesting to "Try Again", Trunk could retry the download by itself. This would lead to more stable pipelines when using Trunk.

So add a retrying strategy to the download function

trunk/src/tools.rs

Line 397 in f1ee3d4

async fn download(