recipes parser

Parsing grammars requires the pegasus software: https://github.com/DanilaFe/pegasus

toying with spec library

The parser is composed of two main files:

• parser.cr, lexer + grammar
• spec.cr, high-level parser to include in softwares

toying with new grammar

After downloading the pegasus̀ software.

# simple example for debug & chill
watch -d ./build.sh test-grammars/simpletokens 2>/dev/null | grep -vE "(Token|^[)])"
../pegasus/bin/pegasus-crystal < test-grammars/simpletokens.json