feat(protection): add configurable Strength effect

src/main/resources/config.yml

@@ -1,8 +1,9 @@
 # Whether Leaf protection is available server-wide.
 enabled: true
 
-# Visible Minecraft Resistance level (I-V).
+# Visible Minecraft Resistance and Strength levels (I-V).
 resistance-level: 1
+strength-level: 1
 
 # Legacy color codes are supported.
 prefix: "&a🍃 "
@@ -10,6 +11,6 @@ prefix: "&a🍃 "
 # Calendar-day onboarding window measured from first join.
 onboarding-days: 7
 
-welcome-message: "&aLeaf protection is available: /leaf on, /leaf off, or /leaf status. Attacking another player opts you out."
+welcome-message: "&aLeaf Resistance and Strength are available: /leaf on, /leaf off, or /leaf status. Attacking another player opts you out."
 combat-disabled-message: "&cLeaf protection was disabled because you attacked another player. You may use /leaf on again when permitted."
 locked-message: "&cAn administrator locked your Leaf setting."

src/main/resources/plugin.yml

@@ -2,12 +2,12 @@ name: Leaf
 version: ${version}
 main: games.dmg.leaf.LeafPlugin
 api-version: "1.20"
-description: Voluntary visible Resistance protection for non-aggressive players.
+description: Voluntary visible Resistance and Strength protection for non-aggressive players.
 author: dmg.games
 commands:
   leaf:
     description: Control or administer Leaf protection.
-    usage: /leaf <on|off|status|enabled|strength|player>
+    usage: /leaf <on|off|status|enabled|effect|strength|player>
 permissions:
   leaf.use:
     description: Allows a player to control their own Leaf protection.