Adds JWT-based auth with refresh tokens

src/main/kotlin/net/halfbinary/scavengerhuntapi/config/AuthEntrypointJwt.kt

@@ -0,0 +1,18 @@
+package net.halfbinary.scavengerhuntapi.config
+
+import jakarta.servlet.http.HttpServletRequest
+import jakarta.servlet.http.HttpServletResponse
+import org.springframework.security.core.AuthenticationException
+import org.springframework.security.web.AuthenticationEntryPoint
+import org.springframework.stereotype.Component
+
+@Component
+class AuthEntrypointJwt: AuthenticationEntryPoint {
+    override fun commence(
+        request: HttpServletRequest,
+        response: HttpServletResponse,
+        authException: AuthenticationException
+    ) {
+        response.sendError(HttpServletResponse.SC_UNAUTHORIZED, authException.message)
+    }
+}