feat: created keycloak plugin to add CAS as a Identity Provider

CAS/Dockerfile

@@ -0,0 +1,6 @@
+FROM maven:3.8.8-eclipse-temurin-21-alpine
+
+COPY ./keycloak-cas/ .
+
+RUN mvn clean package
+

CAS/build.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+if [ ! -d "./keycloak-cas/" ]
+then
+    git clone https://github.com/RoboJackets/keycloak-cas
+fi
+if [ -d "./target/" ]
+then
+	rm -r target/
+fi
+docker build -t build-dep .
+docker create -it --name build-dep-container build-dep bash
+docker cp build-dep-container:/target ./target
+docker rm -f build-dep-container