create style guide for gear/equipment descriptions based on ShilohT's suggestions in https://github.com/HabitRPG/habitrpg-shared/pull/372

locales/en/gear_README.md

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+To maintain consistency in equipment descriptions, the following guidelines have been proposed (https://github.com/HabitRPG/habitrpg-shared/pull/372):
+
+#### Order of elements:
+1. Description.
+2. Stat Effect.
+3. Event/Origin(if needed)
+
+#### Stat Effect
+Examples of wording:
+* No bonus:
+* Confers no benefit.
+* Single or all stat bonus:
+* Increases (Strength/Intelligence/Constitution/Perception/all attributes) by (<%= str %>/<%= int %>/<%= con %>/<%= per %>/<%= attrs %>).
+* Two stats, same bonus:
+* Increases (Strength/Intelligence/Constitution) and (Intelligence/Constitution/Perception) by <%= attrs %> each.
+* Two stats, different bonus
+* Increases (Strength/Intelligence/Constitution) by (<%= str %>/<%= int %>/<%= con %>) and (Intelligence/Constitution/Perception) by (<%= int %>/<%= con %>/<%= per %>)].
+
+Long form:
+* Confers no benefit. / Increases (Strength/Intelligence/Constitution/Perception/all attributes) [and (Intelligence/Constitution/Perception)] by (<%= str %>/<%= int %>/<%= con %>/<%= per %>/<%= attrs %>) [each/and (Intelligence/Constitution/Perception) by (<%= int %>/<%= con %>/<%= per %>)].
+
+#### Event/Origin:
+Examples of wording:
+* (Month) (Year) Subscriber Item.
+* Limited Edition (Year) (Season) Gear.