Shrinking Azure Pipeline task extensions using esbuild

Azure Pipelines task extensions were optimized using esbuild, reducing file size and number of files.

“TL;DR We bundled an internal Azure Pipelines task extension into a single bundled JavaScript file using esbuild. The task package dropped from tens of megabytes and thousands of files to three files per task ( script.js , task.json , and icon.png ). The change took about 20 lines of build tooling. W”