[Build] Add Jenkins pipeline to improve release preparation automation

The script 'getPreviousRelease.sh' is not considered as it seems to be
unused and is intended to be removed soon.

Author: HannesWell

.github/workflows/README.MD

@@ -6,10 +6,6 @@ This repository contains some workflows that can be shared across all platform r
 
 Check if there is currently a freeze period in place.
 
-## updateRelease.yml
-
-Workflow that can be used to trigger an automatic update to the next release when a new milestone is created
-
 ## checkMergeCommits.yml
 
 Check if a PR contains unwanted merge commits.

.github/workflows/prepareRelease.yml

@@ -59,4 +59,30 @@ Releases are published to <a href="https://repo1.maven.org/maven2/org/eclipse/">
 			scriptPath('JenkinsJobs/Releng/publishToMaven.jenkinsfile')
 		}
 	}
-}
+}
+
+pipelineJob('Releng/prepareNextDevCycle'){
+	displayName('Prepare next Development Cycle')
+	description('Perform all steps to prepare the next development cycle of Eclipse.')
+	parameters {
+		booleanParam('DRY_RUN', true, 'If enabled, the final publication of all changes is skipped. Useful for debugging and to very that the pipeline behaves as intended.')
+		stringParam('NEXT_RELEASE_VERSION', null, 'Version of the release to prepare, for example: 4.37')
+		stringParam('PREVIOUS_RELEASE_CANDIDATE_ID', null, 'Id of the current release-candiate for the previous release, for example: S-4.36RC2-202505281830')
+		stringParam('M1_DATE', null, 'Milestone 1 end date in the format yyyy-mm-dd, for example: 2025-07-04')
+		stringParam('M2_DATE', null, 'Milestone 2 end date in the format yyyy-mm-dd, for example: 2025-07-25')
+		stringParam('M3_DATE', null, 'Milestone 3 end date in the format yyyy-mm-dd, for example: 2025-08-15')
+		stringParam('RC1_DATE', null, 'Release-Candidate 1 end date in the format yyyy-mm-dd, for example: 2025-08-22')
+		stringParam('RC2_DATE', null, 'Release-Candidate 2 end date in the format yyyy-mm-dd, for example: 2025-08-29')
+		stringParam('GA_DATE', null, 'Final general availability release date in the format yyyy-mm-dd, for example: 2025-09-10')
+	}
+	definition {
+		cpsScm {
+			lightweight(true)
+			scm {
+				github('eclipse-platform/eclipse.platform.releng.aggregator', 'master')
+			}
+			scriptPath('JenkinsJobs/Releng/prepareNextDevCycle.jenkinsfile')
+		}
+	}
+}
+