added has_enchant condition and enchant filter

docs/effects/all-conditions/has_enchant.md

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+# `has_enchant`
+
+Requires a player to have certain enchant(s)
+# Example Configs
+```yaml
+- id: has_enchant
+  args:
+    enchant: sharpness # The enchant ID 
+    slot: mainhand # The slot
+```
+
+Multiple enchants and/or slots are supported:
+```yaml
+- id: has_enchant
+  args:
+    enchants: # All enchants must be present on a single item in the slot(s).
+      - looting # The enchant ID (enchant / enchant:<level> / enchant:<min-max>)
+      - knockback:2
+      - sharpness:1-3
+    slots: # The enchant must be present in ANY specified slot.
+      - mainhand
+      - 6
+      - helmet
+```
+
+| Arg               | Example         | Result                                                                 |
+| ----------------- | --------------- | ---------------------------------------------------------------------- |
+| `enchant`         | `sharpness`     | Any level of the enchantment will satisfy the condition.               |
+| `enchant:level`   | `sharpness:1`   | Only the specified enchantment & level will satisfy the condition.     |
+| `enchant:min-max` | `sharpness:1-3` | Only enchant levels in the specified range will satisfy the condition. |
+The options for slot are `mainhand`, `offhand`, `hands`, `helmet`, `chestplate`, `leggings`, `boots`, `armor`, `any`, or a number from 0-40 (to specify an exact slot).

docs/effects/all-filters/enchant.md

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+# `enchant`
+
+The list of enchants that the `enchant_item` trigger should activate against
+
+# Example Config
+```yaml
+filters:
+  enchant: 
+    - sharpness
+    - knockback
+```