Removes Mortar Recipe's cement recipe book requirement

[VileReviled]

Summary

Balance "Mortar is now an autolearned recipe"

Purpose of change

Fixes #74015.

Describe the solution

Makes Mortar into an autolearned recipe, and removes book requirement.

Describe alternatives you've considered

As many commenters in #74015 agree, simply making this into an autolearned recipe is a little pathetic. I'd love to revisit this once I have more experience

Testing

Linting produced no errors I can tell. I can't test through Docker currently; testing welcome!!!

Additional context

This is my first PR! Feedback appreciated

[Maleclypse]

{
    "id": "bag_durasack_cement",
    "type": "GENERIC",
    "category": "container",
    "name": { "str": "durable plastic sack, cement" },
    "looks_like": "bag_plastic",
    "description": "A large and sturdy sack, made out plastic material.  Stores cement and has instructions on how to use it to make mortar.",
    "//": "durasack woven polypropylene bags",
    "copy-from": "bag_durasack",
    "use_action": {
      "type": "effect_on_conditions",
      "description": "Instructions on what to do with the contents of the bag.",
      "effect_on_conditions": [ "EOC_CEMENT_INSTRUCTIONS" ]
    }
  },
  {
    "type": "effect_on_condition",
    "id": "EOC_CEMENT_INSTRUCTIONS",
    "condition": { "and": [ { "u_has_trait": "ILLITERATE" }, { "not": "u_driving" } ] },
    "effect": [
      { "u_learn_recipe": "mortar_build" }
    ]
  },

This would be an ideal way to resolve this. If you want me to I can update your PR with this and fix the itemgroups that would need updating as well.

[VileReviled]

This would be an ideal way to resolve this. If you want me to I can update your PR with this and fix the itemgroups that would need updating as well.

Yes please! I agree that this is ideal.

[Maleclypse]

I really appreciate you putting a PR together for this. Thank you for doing this and I hope to see you contribute some more :)