Improve error message to highlight solution to user configuration err…

[beattyml1]

…or highlighted in issue 8662

Pull Request Check List

Resolves: #8662

Provides additional help text error message for Warning: The current project could not be installed. I know the issue above is closed but I think this is also very helpful for helping people to understand issue. If you don't agree I won't raise a fuss just thought I'd offer to add add the help text to the error message that would have helped me.

• [N/A] Added tests for changed code.
  • Checked for existing code for tests related to this error message
  • No control flow to change just a error message text
  • Tests still pass on local
• [N/A] Updated documentation for changed code.

[radoering]

Suggested change

	"If you did intend to install the current project please make sure"
	" you set the packages setting in your pyproject.toml file.\n"
	"If you did intend to install the current project you may need"
	" to set `packages` in your pyproject.toml file.\n"

I agree it makes sense to provide additional information. I would only rephrase it slightly because setting packages is only required if your package name does not match your project name.