* Converts move intents to /decl/move_intent
Adds /decl/move_intent/walk and /decl/move_intent/run.
Switches all move intent checks to use the new IS_RUNNING and IS_WALKING macros.
Renames and refactors /mob/living/proc/set_m_intent() to /mob/living/proc/set_move_intent(decl/move_intent/intent).
Removes the unnecessary /mob/var/m_int and associated code.
Updates all move intent setters to use set_move_intent().
* Swaps incorrect config values
Swaps incorrect move delays since I got them backwards somehow, oopsies.
* Adds suggested ?. operator
Compactifies two if statements using the ?. operator instead.
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