feat(cli.js): show full error message

[lucasfernog]

What kind of change does this PR introduce?

• Bugfix
• Feature
• Docs
• New Binding issue #___
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change?

• Yes, and the changes were approved in issue #___
• No

Checklist

• When resolving issues, they are referenced in the PR's title (e.g fix: remove a typo, closes #___, #___)
• A change file is added if any packages will require a version bump due to this PR per the instructions in the readme.
• I have added a convincing reason for adding this feature, if necessary

Other information

See https://docs.rs/anyhow/latest/anyhow/struct.Error.html#display-representations

[FabianLars]

While we're at it, can we print out the actual error here too? https://github.com/tauri-apps/tauri/blob/dev/tooling/cli/src/dev.rs#L324 "failed to run cargo" is really not that helpful. (Made it hard to help someone on discord yesterday)

That may be something for a different PR tho? idk

[lucasfernog]

I'll make that change later as a separate PR.