[ci] Add quick links to readme

makes it easier than trying to find in documentation and the header types isn't linked from documentation.  For those that need quick reference, I generally list both these in pom usage.  So it only makes sense to make it up front and clear.

README.md

@@ -1,4 +1,17 @@
+# LIcense Maven Plugin
+
 - __Build Status:__ [![Java CI](https://github.com/mathieucarbou/license-maven-plugin/actions/workflows/ci.yaml/badge.svg)](https://github.com/mathieucarbou/license-maven-plugin/actions/workflows/ci.yaml)
 - __Issues:__ https://github.com/mathieucarbou/license-maven-plugin/issues
 - __Documentation:__ https://mycila.carbou.me/license-maven-plugin/
 - __License:__ [Apache License 2.0](http://www.apache.org/licenses/LICENSE-2.0)
+
+## Quick Links ##
+
+- [Default Excludes](https://github.com/mathieucarbou/license-maven-plugin/blob/master/license-maven-plugin/src/main/java/com/mycila/maven/plugin/license/Default.java)
+- [Header Types](https://github.com/mathieucarbou/license-maven-plugin/blob/master/license-maven-plugin/src/main/java/com/mycila/maven/plugin/license/header/HeaderType.java)
+
+## Quick Tip ##
+
+Often necessary to exclude a number of files that would otherwise grow the exclusion list on setup and do not fit with the default exclusions provided by this plugin.  To exclude complete sections, please into a special folder to do exactly that.
+
+```**/unlicensed/**```