Add commercial tooling section

Signed-off-by: MikeBauerCA <[email protected]>

Author: MikeBauerCA

.gitignore

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 .DS_Store
 *~
-COBOL Programming with VSCode.pdf
+*.pdf

COBOL Programming Course #1 - Getting Started/Commercial Tooling/IBM Developer for zOS/COBOL Programming Course #1 - Getting Started - IDz.md

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+# COBOL Programming Course #1 - Getting Started - Commercial Tooling
+
+This directory contains implementations of COBOL Programming Course #1 using commercial tooling. Neither this project nor Open Mainframe Project reviews, maintains, or endorses any one of these commercial tools. If you would like to add your implementation of the course using commercial tooling, feel free to open a pull request to have it included.
+
+## How to get started
+
+There are currently no official releases of COBOL Programming Course #1 using commercial tooling. All content remains in development. However, you can view and contribute to the following implementations:
+- [IBM Developer for z/OS](IBM%20Developer%20for%20zOS/COBOL%20Programming%20Course%20#1%20-%20Getting%20Started%20-%20IDz.md)
+
+## Providers
+
+To leverage commercial tooling while completing this course, vendors offer free trials for their commercial tools.
+
+- IBM has provided a [free trial to IDz environment](https://developer.ibm.com/mainframe/products/ibm-z-open-development).
+
+## Build
+
+PDFs can be built using [pandoc](https://pandoc.org/) and [MiKTeX](https://miktex.org/)