feat: support analysis of URLs

[a-frantz]

Adds remote file support to wdl-analysis and the wdl binary.

With this change, we have the option to stop cloning repos in Gauntlet.

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[adthrasher]

Is this sufficient? What about other protocols such as FTP? Or URLs that omit the leading protocol?

[a-frantz]

Would it be better to just always call Url::parse(), and if that fails attempt PathBuf::from() (and if that fails, bail!())?

[a-frantz]

Just typed up the following and it seems to work:

    let file = if let Ok(url) = Url::parse(&file) {
        url
    } else if let Some(url) = path_to_uri(&PathBuf::from(file.clone())) {
        url
    } else {
        bail!("failed to convert `{file}` to a URI", file = file)
    };

[adthrasher]

That's what I was wondering. I'm curious to hear other thoughts on this, but it makes sense to me.

[peterhuene]

I think it makes sense to attempt to parse it as a URI and fallback to treating it as a path (also, path_to_uri should probably be changed to take impl AsRef<Path> instead of &Path).

Regarding the supported schemes for the URIs, I think only http, https, and file should be supported as it's the only schemes required by the standard for import statements (with file currently deprecated and http should definitely be deprecated, but isn't currently).

[peterhuene]

Looks good, just the nit comment.