Return helpful error message when unable to create build lock

[OsazuwaOyegun]

This is a bug in the Gleam compiler, sorry!

Please report this crash to https://github.com/gleam-lang/gleam/issues/new
and include this error message with your report.

Panic: compiler-cli/src/build_lock.rs:38
LockFile creation: Os { code: 13, kind: PermissionDenied, message: "Permission denied" }
Gleam version: 1.5.1
Operating system: macos

If you can also share your code and say what file you were editing or any
steps to reproduce the crash that would be a great help.

You may also want to try again with the GLEAM_LOG=trace environment
variable set.

[Info - 8:54:54 AM] Connection to server got closed. Server will restart.
true
INFO language_server_starting
Hello human!

This command is intended to be run by language server clients such
as a text editor rather than being run directly in the console.

Many editors will automatically start the language server for you
when you open a Gleam project. If yours does not you may need to
look up how to configure your editor to use a language server.

You can exit this program by pressing ctrl+c.

[lpil]

Hello! The issue here is that Gleam is unable to write to the directory it is open it. Is it read-only for your user?

Let's make this error message clearer

[brendisurfs]

@lpil could I take care of this one? I believe I have some time coming up over the next few days to make a fix :) ill take a closer look at the code tomorrow morning just to make sure I understand the full context of the calling function.

[brendisurfs]

nevermind saw someone hopped on it!