Jump to the entry point line when viewing or editing a shader

[qwmnerbvqwmn]

Description

Improves UX by automatically scrolling the shader editor to the line where the entry point function is defined when a user opens a shader for viewing or editing.

[baldurk]

I do not want to make this change. This is too complicated and error prone and the code that's already there does the most reliable thing it can. This is making the big assumption that the entry point name is unique enough to only show up in one place which may be true for some shaders but definitely isn't true in the general case.

The existing code already uses the debug info to scroll to the entry point where available, since that is verifiable and always correct. Doing text-searches for the entry point string and scrolling is not reliable enough for me to be happy doing that as a very common entry point name is going to be main which could appear in many places in the shader source.