feat: Make crop description editable

This change makes the crop description editable on the crop edit page.

It adds a text area for the description to the crop form and permits the description attribute in the crops controller, allowing users to update the crop's description.

app/controllers/crops_controller.rb

@@ -192,6 +192,7 @@ class CropsController < ApplicationController
       :parent_id, :perennial,
       :request_notes, :reason_for_rejection,
       :rejection_notes,
+      :description,
       :row_spacing, :spread, :height,
       :sowing_method, :sun_requirements, :growing_degree_days,
       scientific_names_attributes: %i(scientific_name _destroy id)

app/views/crops/_form.html.haml

@@ -42,6 +42,7 @@
         %span.help-block Living more than two years
 
       %h2 OpenFarm Data
+      = f.text_area :description, label: 'Description'
       = f.number_field :row_spacing, label: 'Row Spacing (cm)', min: 0
       = f.number_field :spread, label: 'Spread (cm)', min: 0
       = f.number_field :height, label: 'Height (cm)', min: 0