Added lookup functions for multiple files

[tusharad]

• Implemented lookupAllInputs to retrieve all textual inputs with a specific name attribute.
• Implemented lookupAllFiles to retrieve all file inputs with a specific name attribute.
• Implemented lookupInputAs to find a textual input and parse it into a desired type using FromText.
• Implemented lookupAllInputsAs to find multiple textual inputs and parse them into a list of a specified type.
• Added a FromText type class to facilitate parsing of various data types from Text.
• Implemented instances for basic types like Text, Int, Bool, Double, Integer, Float, and Maybe a

Let me know if anything else is required. @maksbotan