Support color log output

Rework logback formatting to include ansi color output. Also added
support for JUL over SLF4J to ensure that tomcat logging looks OK.

Issue: #53249833

spring-bootstrap/pom.xml

@@ -63,6 +63,11 @@
 			<artifactId>slf4j-api</artifactId>
 			<optional>true</optional>
 		</dependency>
+		<dependency>
+			<groupId>org.slf4j</groupId>
+			<artifactId>jul-to-slf4j</artifactId>
+			<optional>true</optional>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework</groupId>
 			<artifactId>spring-web</artifactId>