Update NX Runner documentation

* Add documentation for CMake generation.
* Improve description for each of the commands.
* Add examples for using each of the commands.

Fixes #731

src/nxrunner/docs/NX_CLI.md

@@ -1,5 +1,9 @@
 # NX Runner (NX CLI)
 
+NX Runner is an executable that allows preflighting and executing complex pipelines from the command line. The executable is created as part of the default complex CMake project and created alongside the complex library file.
+
+In addition, NX Runner contains commands for porting SIMPL pipeline files to complex pipelines. One of these commands prints the converted pipeline to the terminal, and the other saves the converted pipeline to a new file using the complex pipeline extension.
+
 ## Commands
 
 ### Help
@@ -19,7 +23,9 @@ Lists available commands or displays details regarding a specific command.
 -e <pipeline filepath> [--logfile | -l]
 ```
 
-Execute the pipeline at the target filepath. Optionally, create a log file at the specified path.
+Executes the pipeline at the target filepath while printing the output to the terminal. Optionally, a log file is created at the specified filepath where the output is saved.
+
+For example, ```--execute bash D:/Directory/pipeline.d3pipeline -l D:/Logs/pipeline.log``` will attempt to execute the pipeline at `D:/Directory/pipeline.d3pipeline` and saves the output to `D:/Logs/pipeline.log`.
 
 ### Preflight
 
@@ -28,7 +34,9 @@ Execute the pipeline at the target filepath. Optionally, create a log file at th
 -p <pipeline filepath> [--logfile | -l]
 ```
 
-Preflight the pipeline at the target filepath. Optionally, create a log file at the specified path.
+Preflights the pipeline at the target filepath while printing the output to the terminal. Optionally, a log file is created at the specified filepath where the output is saved.
+
+For example, ```--preflight bash D:/Directory/pipeline.d3pipeline -l D:/Logs/pipeline.log``` will attempt to preflight the pipeline at `D:/Directory/pipeline.d3pipeline` and saves the output to `D:/Logs/pipeline.log`.
 
 ### Convert
 
@@ -40,7 +48,8 @@ Preflight the pipeline at the target filepath. Optionally, create a log file at
 -co <pipeline filepath> [--logfile | -l]
 ```
 
-Convert the SIMPL pipeline at the target filepath. Optionally, create a log file at the specified path.
-Both options print the converted pipeline to the console. The second option (convert-output / co) also saves the converted pipeline to file based on the name of the converted pipeline.
+Converts a SIMPL pipeline at the target filepath to a complex pipeline. If any errors are encountered during the process, they are printed to the console. Otherwise, the converted pipeline is printed to the console. Optionally, a log file is created at the specified filepath where the output is saved.
+
+The second option (convert-output / co) also saves the converted pipeline to file based on the name of the converted pipeline using the complex pipeline extension (`.d3pipeline`).
 
 For example, ```--convert-output bash D:/Directory/SIMPL.json``` will attempt to convert the SIMPL pipeline at `D:/Directory/SIMPL.json` and save the converted pipeline to `D:/Directory/SIMPL.d3pipeline`