Fix: convert fillstruct's output to character offset

[stdupp]

The 'start', 'end' filed in fillstruct output is byte offset, but the parameter of 'editor.document.positionAt' is character offset, so if a source code include multi-byte string, vscode can't fill the struct into the right position.

[stdupp]

PTAL @ramya-rao-a

[nicoxb]

there was a conflict, and not merged?

[stdupp]

I think the CI build problem is not caused by this pr, please take a look @ramya-rao-a

[nicoxb]

problem not fixed yet!

[ramya-rao-a]

@stdupp, @nicoxb Can either of you provide a small code snippet where we can try to replicate the problem?

[nicoxb]

@ramya-rao-a Hi, there are some code snippet:

type User struct {
	ID   int64
	Name string
	Age  int
}
// expected
func foo1() {
	u := &User{
		ID:   0,
		Name: "",
		Age:  0,
	}
	fmt.Println(u)
}

// unexpected
func foo2() {
	// multi-byte char
	// 多字节字符
	u := &User{}
	fmUser{
		ID:   0,
		Name: "",
		Age:  0,
	}tln(u)
}

[ramya-rao-a]

Thanks @stdupp and @nicoxb
I pushed a commit to resolve the merge conflicts

[ramya-rao-a]

The latest update 0.14.2 has this fix, Thanks @stdupp!