[Request] Symbols in instructions to indicate values to be multiplied with servings.

[LoganJFisher]

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There are two types of numbers that appear in recipes: those which should be multiplied with servings (e.g. "add 1 ounce of milk"), and those that should not (e.g. "Set oven to 220°C"). Mealie supports increasing the number of servings of a recipe being made, multiplying the ingredients, but there is no consideration for values presented in instruction steps.

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I would like to propose that it should be possible to surround numbers and their associated units of the former type with $ (e.g. "add $1 ounce$ of milk") to indicate that it is a number that should be appropriately automatically multiplied when increasing the servings being made (e.g. when 2x the base level of servings is selected, it would change to "add 2 ounces of milk" — note that the units also changed to their appropriate plural form).

Please consider and list out some caveats or tradeoffs made in your design decision

There should be text added below the "Attach images by dragging & dropping them in the editor" to explain this function.

Additional Information

• If this is accepted I'm willing to submit a PR to provide this feature
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