Clarify NonSemantic Shader DebugInfo Line/Column

[spencer-lunarg]

Every text editor I am aware of use 1-index for line/columns and I would imagine the same for Shader DebugInfo

This adds a section to clarify that a Line/Column of 1 is the start

[bashbaug]

I wonder if we should match DWARF5 even more closely. From Section 6.2.2 of the DWARF5 specification:

Line: An unsigned integer indicating a source line number. Lines are numbered beginning at 1. The compiler may emit the value 0 in cases where an instruction cannot be attributed to any source line.

Column: An unsigned integer indicating a column number within a source line. Columns are numbered beginning at 1. The value 0 is reserved to indicate that a statement begins at the “left edge” of the line.

[spencer-lunarg]

I wonder if we should match DWARF5 even more closely. From Section 6.2.2 of the DWARF5 specification:

Wow, that is WAY better of a description and basically want I wanted to say