Update jdt.ui's main README and CONTRIBUTING file

Update links, remove obsolete sections and use simpler markdown style.

Author: HannesWell

CONTRIBUTING

@@ -1,59 +1,3 @@
 # Contributing to Eclipse Java development tools
 
-Thanks for your interest in this project.
-
-## Project description
-
-The JDT project provides the tool plug-ins that implement a Java IDE supporting
-the development of any Java application, including Eclipse plug-ins. It adds a
-Java project nature and Java perspective to the Eclipse Workbench as well as a
-number of views, editors, wizards, builders, and code merging and refactoring
-tools. The JDT project allows Eclipse to be a development environment for
-itself.
-
-* https://projects.eclipse.org/projects/eclipse.jdt
-
-## Developer resources
-
-Information regarding source code management, builds, coding standards, and
-more.
-
-* https://projects.eclipse.org/projects/eclipse.jdt/developer
-
-The project maintains the following source code repositories
-
-* http://git.eclipse.org/c/jdt/eclipse.jdt.core.binaries.git
-* http://git.eclipse.org/c/jdt/eclipse.jdt.core.git
-* http://git.eclipse.org/c/jdt/eclipse.jdt.debug.git
-* http://git.eclipse.org/c/jdt/eclipse.jdt.git
-* http://git.eclipse.org/c/jdt/eclipse.jdt.ui.git
-
-This project uses Bugzilla to track ongoing development and issues.
-
-* Search for issues: https://eclipse.org/bugs/buglist.cgi?product=JDT
-* Create a new report: https://eclipse.org/bugs/enter_bug.cgi?product=JDT
-
-Be sure to search for existing bugs before you create another one. Remember that
-contributions are always welcome!
-
-## Eclipse Contributor Agreement
-
-Before your contribution can be accepted by the project team contributors must
-electronically sign the Eclipse Contributor Agreement (ECA).
-
-* http://www.eclipse.org/legal/ECA.php
-
-Commits that are provided by non-committers must have a Signed-off-by field in
-the footer indicating that the author is aware of the terms by which the
-contribution has been provided to the project. The non-committer must
-additionally have an Eclipse Foundation account and must have a signed Eclipse
-Contributor Agreement (ECA) on file.
-
-For more information, please see the Eclipse Committer Handbook:
-https://www.eclipse.org/projects/handbook/#resources-commit
-
-## Contact
-
-Contact the project developers via the project's "dev" list.
-
-* https://dev.eclipse.org/mailman/listinfo/jdt-dev
+See https://github.com/eclipse-jdt/.github/blob/main/CONTRIBUTING.md

README.md

@@ -1,68 +1,45 @@
-Contributing to JDT UI - Java development tools UI
-============================================
-
-Thanks for your interest in this project.
-
-Project description:
---------------------
+# JDT UI - Java development tools UI
 
 The JDT UI implements the user interface for the Java IDE. This includes views like Package Explorer and JUnit, the Java and properties files editors, Java search, and refactorings.
-Website: <http://www.eclipse.org/jdt/ui/>
 
-- <https://projects.eclipse.org/projects/eclipse.jdt.ui>
+For more information and important links, refer to the [JDT UI website](https://eclipse.dev/jdt/ui/) or the [JDT project overview page](https://projects.eclipse.org/projects/eclipse.jdt).
+
+## Contributing
 
-How to contribute:
---------------------
 Contributions to JDT UI are most welcome. There are many ways to contribute, 
 from entering high quality bug reports, to contributing code or documentation changes. 
-For a complete guide, see the [How to Contribute] [1] page on the team wiki.
+For a complete guide, see the [How to Contribute](https://wiki.eclipse.org/JDT_UI/How_to_Contribute) page on the team wiki.
 
-Developer resources:
---------------------
+## Developer resources
 
 Information regarding source code management, builds, coding standards, and more.
 
-- <https://projects.eclipse.org/projects/eclipse.jdt.ui/developer>
-
-Contributor License Agreement:
-------------------------------
+- https://eclipse.dev/jdt/ui/index.php#dev
 
-Before your contribution can be accepted by the project, you need to create and electronically sign the Eclipse Foundation Contributor License Agreement (CLA).
+## Contributor License Agreement
 
-- <http://www.eclipse.org/legal/CLA.php>
+Before your contribution can be accepted by the project, you need to create and electronically sign the Eclipse Foundation Contributor License Agreement (ECA).
 
-Forum:
-------
+- https://www.eclipse.org/legal/eca/
 
-Public forum for Eclipse JDT users.
-
-- <http://www.eclipse.org/forums/eclipse.tools.jdt>
-
-Search for bugs/issues:
-----------------
+## Search for bugs/issues
 
 This project uses Github issues to track ongoing development and issues.
 
-- [https://github.com/eclipse-jdt/eclipse.jdt.ui/issues](https://github.com/eclipse-jdt/eclipse.jdt.ui/issues)
+- https://github.com/eclipse-jdt/eclipse.jdt.ui/issues
 
-Create a new bug/issue:
------------------
+## Create a new bug/issue:
 
 Be sure to search for existing issue before you create another one. Remember that contributions are always welcome!
 
-- [https://github.com/eclipse-jdt/eclipse.jdt.ui/issues](https://github.com/eclipse-jdt/eclipse.jdt.ui/issues)
+- https://github.com/eclipse-jdt/eclipse.jdt.ui/issues
 
-Contact:
---------
+## Contact
 
 Contact the project developers via the project's "dev" list.
 
-- <https://dev.eclipse.org/mailman/listinfo/jdt-dev>
-
-License
--------
+- https://accounts.eclipse.org/mailing-list/jdt-dev
 
-[Eclipse Public License (EPL) v2.0][2]
+## License
 
-[1]: https://wiki.eclipse.org/JDT_UI/How_to_Contribute
-[2]: http://wiki.eclipse.org/EPL
+[Eclipse Public License (EPL) v2.0](https://www.eclipse.org/legal/epl-2.0/)