Add 1.18 migration guide

guide/docs/migration/1_17_to_1_18.md

@@ -0,0 +1,42 @@
+# Upgrading to KSpigot for 1.18 (from 1.17)
+
+## Use it with paperweight (really (like really))
+
+Please use this library together with the paperweight Gradle plugin, as it remaps the obfuscated parts of the KSpigot
+jar to mojmap, and adds all necessary dependencies with one bundle!
+
+`settings.gradle.kts`
+```kt
+pluginManagement {
+    repositories {
+        gradlePluginPortal()
+        maven("https://papermc.io/repo/repository/maven-public/")
+    }
+}
+```
+
+`build.gradle.kts`
+```kt
+plugins {
+    id("io.papermc.paperweight.userdev") version "VERSION"
+}
+
+dependencies {
+    paperDevBundle("1.18.1-R0.1-SNAPSHOT")
+    implementation("net.axay:kspigot:1.18.0")
+}
+```
+
+## Removed features
+
+The wrapper for nbt compounds has been removed, use `CompoundTag` of net.minecraft instead!
+
+## Upcoming features
+
+Due to paper now being binary compatible with all other Minecraft modding toolchains, expect to see features
+from [FabrikMC](https://jakobkmar.github.io/fabrikmc/) on the paper side!
+
+## Paper first policy
+
+From now on, KSpigot **only supports Paper**. Use it with "vanilla" Spigot at your own risk. It is highly suggested that you
+use Paper together with this library.

guide/mkdocs.yml

@@ -47,4 +47,5 @@ nav:
       - Brigardier: commands/brigardier.md
       - Brigardier example: commands/brigardier_example.md
   - Migration:
-      - "1.16 -> 1.17": migration/1_16_to_1_17.md
+      - "1.17 to 1.18": migration/1_17_to_1_18.md
+      - "1.16 to 1.17": migration/1_16_to_1_17.md