Rename project to avoid confusion with Jenkins' Declarative Pipeline

[manandbytes]

From https://jenkins.io/doc/book/pipeline/#declarative-versus-scripted-pipeline-syntax:

A Jenkinsfile can be written using two types of syntax - Declarative and Scripted.

Declarative and Scripted Pipelines are constructed fundamentally differently. Declarative Pipeline is a more recent feature of Jenkins Pipeline.

Many of the individual syntactical components (or "steps") written into a Jenkinsfile, however, are common to both Declarative and Scripted Pipeline. Read more about how these two types of syntax differ in Pipeline concepts and Pipeline syntax overview below.