Add externalDocumentationLinks

Signed-off-by: Graham <gpe@openrs2.dev>

build.gradle.kts

@@ -1,6 +1,7 @@
 import org.jetbrains.kotlin.gradle.plugin.KotlinPluginWrapper
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 import java.io.ByteArrayOutputStream
+import java.net.URL
 
 defaultTasks("build")
 
@@ -230,6 +231,74 @@ tasks.dokka {
             url = "https://git.openrs2.dev/openrs2/openrs2/src/commit/${commitHash()}"
             lineSuffix = "#L"
         }
+
+        externalDocumentationLink {
+            url = URL("https://asm.ow2.io/javadoc/")
+        }
+
+        externalDocumentationLink {
+            url = URL("https://www.bouncycastle.org/docs/docs1.5on/")
+        }
+
+        externalDocumentationLink {
+            url = URL("https://www.bouncycastle.org/docs/pkixdocs1.5on/")
+        }
+
+        externalDocumentationLink {
+            url = URL("https://ajalt.github.io/clikt/api/clikt/")
+        }
+
+        externalDocumentationLink {
+            url = URL("https://commons.apache.org/proper/commons-compress/javadocs/api-${Versions.commonsCompress}/")
+        }
+
+        externalDocumentationLink {
+            url = URL("https://guava.dev/releases/${Versions.guava}/api/docs/")
+        }
+
+        externalDocumentationLink {
+            url = URL("https://google.github.io/guice/api-docs/${Versions.guice}/javadoc/")
+        }
+
+        val jacksonVersion = Versions.jackson.split(".")
+            .take(2)
+            .joinToString(".")
+
+        externalDocumentationLink {
+            url = URL("https://fasterxml.github.io/jackson-annotations/javadoc/$jacksonVersion/")
+        }
+
+        externalDocumentationLink {
+            url = URL("https://fasterxml.github.io/jackson-core/javadoc/$jacksonVersion/")
+        }
+
+        externalDocumentationLink {
+            url = URL("https://fasterxml.github.io/jackson-databind/javadoc/$jacksonVersion/")
+        }
+
+        externalDocumentationLink {
+            url = URL("https://fasterxml.github.io/jackson-dataformats-text/javadoc/yaml/$jacksonVersion/")
+        }
+
+        externalDocumentationLink {
+            url = URL("http://www.jdom.org/docs/apidocs/")
+        }
+
+        externalDocumentationLink {
+            url = URL("https://google.github.io/jimfs/releases/${Versions.jimfs}/api/docs/")
+        }
+
+        externalDocumentationLink {
+            url = URL("https://junit.org/junit5/docs/${Versions.junit}/api/")
+        }
+
+        externalDocumentationLink {
+            val version = Versions.netty.split(".")
+                .take(2)
+                .joinToString(".")
+
+            url = URL("https://netty.io/$version/api/")
+        }
     }
 }