[glsl-in] Add initial support for glslpp-rs (#513)

* [glsl-in] Add initial support for glslpp-rs

* [glsl-in] Add remaining Punct mappings

Fix some tests.

* [glsl-in] Add basic error handling for glslpp-rs

* [glsl-in] Fix clippy issues

* [glsl.in] Add pp-rs floats

* [glsl-in] Remove old lex and preprocessor

* [glsl-in] Improve lexer token code

* [glsl-in] Rename lex_pp > lex

Also LexerPP > Lexer

* [glsl-in] glslpp-rs review feedback

* [glsl-in] Use rev for pp-rs dep

* [glsl-in] Parse on lexer err