Write analysis for concept exercise paolas-prestigious-pizza

[jiegillet]

From design file

Analyzer

• [essential] priceParser should use int (instead of number?)
• [essential] vegetarianParser should use symbol or keyword (both are ok)
• [essential] vegetarianParser should use Parser.oneOf
• [essential] wordParser should use chompWhile, getChompedString, and map
• [essential] ingredientsParser should use oneIngredientParser
• [essential] pizzaParser should use wordParser, vegetarianParser, ingredientsParser and priceParser
• [essential] menuParser should use pizzaParser
• [essential] oneIngredientParser should use chompWhile, getChompedString and andThen
• [actionable] priceParser should use symbol (more appropriate than keyword for €)
• [informative] sequence should be used anywhere for the sake of learning (instead of loop?)