doc: CPLYTM-498 add document for sync-cac-content

Signed-off-by: Sophia Wang <huiwang@redhat.com>

README.md

@@ -38,6 +38,8 @@ Below is a table of the available commands and their current availability as a G
 
 For detailed documentation on how to use each action, see the README.md in each folder under [actions](./actions/).
 
+Also the available command `sync-cac-content` supports transforming the [Cac content](https://github.com/ComplianceAsCode/content) to OSCAL component definition in a trestle workspace. For detailed documentation on how to use, see the sync-cac-content.md under [docs/tutorials](./docs/tutorials/).  
+
 ### Supported Git Providers
 
 > Note: Only applicable if using `trestle-bot` to create pull requests. Automatically detecting the git

docs/tutorials/sync-cac-content.md

@@ -0,0 +1,36 @@
+# The trestlebot command line sync-cac-content Tutorial
+
+This tutorial provides how to use `trestlebot sync-cac-content` to create OSCAL component definitions by transforming Cac content control files.
+
+The CLI performs the following transformations:
+
+- Populate CaC product information to Oscal component title and description
+- Ensure OSCAL component control mappings are populated with rule and rule parameter data from CaC control files
+- Create a validation component from SSG rules to check mappings
+- Ensure OSCAL Component Definition implemented requirements are populated from control notes in the control file
+- Ensure implementation status of an implemented requirement in OSCAL component definitions are populated with the status from CaC control files
+
+## 1. Prerequisites
+
+- Initialize the [trestlebot workspace](https://github.com/complytime/trestle-bot/blob/main/docs/tutorials/github.md#3-initialize-trestlebot-workspace).
+
+- Pull the [CacContent repository](https://github.com/ComplianceAsCode/content).
+
+## 2. Run the CLI sync-cac-content
+`poetry run trestlebot sync-cac-content \
+  --repo-path $trestlebot_workspace_directory \
+  --branch main \
+  --cac-content-root ~/content \
+  --cac-profile $CacContentRepo/content/products/ocp4/profiles/high-rev-4.profile \
+  --oscal-profile $OSCAL-profile-name \
+  --committer-email test@redhat.com \
+  --committer-name tester \
+  --product $productname \
+  --dry-run \
+  --component-definition-type $type`
+
+For more details about these options and additional flags, you can use the --help flag:
+`poetry run trestlebot sync-cac-content --help'
+This will display a full list of available options and their descriptions.
+
+After run the CLI with the right options, you would successfully generate an OSCAL component definition under $trestlebot_workplace_director/component-definitions/$product_name.