Redo the "What is a build pipeline" page

[binkley]

NOTE: Discussion leads to talking about Software Supply Chain rather than Build Pipeline.
Merge this card in #575 and break up into playable cards.
Related to #575.

From chat in Slack:

• Record the build output for Gradle and Maven
• Clean up the output to just the tasks/goals (ie, Compile, or Compile tests, or DependencyCheck, etc)
• Categorize each item into a bucket matching the book chapters
• Discuss actual vs logical in the sequence of stages/steps
• Diagram these in a linear sequence
• Links to files in the code base as examples
• Add each into the Terms page using generic language
• Merge into the Introduction page; material is part of introducing the book topic to readers

[binkley]

Cleaned up step/stage output from Gradle and Maven.
Note that the lines in these 2 text file are in the same sequence as the build output (not alphabetized or otherwise altered).

Generated with:

• Gradle: ./gradlew --dry-run
• Maven: ./mvnw buildplan:list

And then edited by hand.

x-gradle.txt
x-maven.csv

[binkley]

Comments for Gradle match to chapters, I think.
Maven is a CVS table, and has not been matched.