fix: removes code lens for commented main functions

[soorya-u]

What it does?

• Code Lens is not not visible on top of main function which is commented out

[Vexu]

This causes the code lens to appear after the last comment instead of before the main function:

There is also a similar regex in zigTestRunnerProvider.ts with the same problem if you'd like to fix that as well.

[soorya-u]

I'm new to zig, so does zig support

test foo { }
// or
test @"foo" { }

The Test Explorer regex recognizes this syntax as a valid test, but the ZLS throws an error.

[Vexu]

Both are valid syntax though the second will be normalized to the first by zig fmt. What error is ZLS giving you?

[soorya-u]

const foo = "";

// valid
test foo { } 

// invalid: use of undeclared identifier 'bar'
test bar { }

I think the variable should be declared for this syntax. Im not sure though.

As for the PR, I think its working as intended now.