feat: adds Lesson 11 documentation (code-differently#293)

* docs: adds assignment details

* chore: adds more details.

* chore: better organizing points

* lint: fixes casing

* chore: adjusts formatting

Signed-off-by: Anthony D. Mays <[email protected]>

* chore: adding underline

---------

Signed-off-by: Anthony D. Mays <[email protected]>

Author: anthonydmays

lesson_11/README.md

@@ -0,0 +1,38 @@
+# Lesson 11
+
+## Homework
+
+* Do the [housekeeping exercise](#housekeeping).
+* Continue working on [Lesson 10][lesson-10] homework assignment on **Applying SOLID Principles**.
+* No additional assigned book reading.
+
+## Housekeeping
+
+To help you complete the homework, I've updated the devcontainer configuration to provide some useful refactoring tools that will save you a substantial amount of time. Please read and follow these instructions carefully to get the latest goodness:
+
+1. First, sync your fork and pull changes to your local machine.
+2. Open the project folder BUT do not click the button to rebuild the container when prompted.
+3. Press `Cmd ⌘ - Shift ⇧ - P` to open the Command Palette. Search for and execute the `Dev Containers: Rebuild Container Without Cache` option. If you get an error while attempting to start the container, just click `Retry` and it should move forward.
+
+![alt text](./images/rebuild-without-cache.png)
+
+4. Let everything run for a couple of minutes to allow the extensions time to install.
+5. Next, uninstall the _[Extension Pack for Java][extension-pack]_ extension if it is still installed in VS Code.
+6. At this point, you should now be using the improved _[Java Platform Support][java-platform]_ extensions that provide more reliable refactoring and unit testing support.
+
+## Using VS Code Refactoring Tools
+
+Once you have the new tools setup, you should now be able to do things like rename a function or variable and update it everywhere it is used. You can [watch this YouTube video][renaming-video] to understand how this tooling works. 
+
+## Troubleshooting
+If you still run into issues here are some things you can try:
+
+* Close VS Code and restart
+* Clean the language server workspace by opening the Command Palette (`Cmd ⌘ - Shift ⇧ - P`) and searching for the `Java: Clean Workspace` option.
+
+![alt text](./images/clean-workspace.png)
+
+[lesson-10]: /lesson_10#applying-solid-principles-library-management-system-part-ii
+[extension-pack]: vscode:extension/vscjava.vscode-java-pack
+[java-platform]: vscode:extension/Oracle.oracle-java
+[renaming-video]: https://www.youtube.com/watch?v=S1Jzrmw0ww8