feat(cli): add docgen cmd for mkdocs pages

docs/cli/workspace-rule.md

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+# workspace-rule
+
+```
+Add a rule to associate an application with a workspace
+
+Usage: workspace-rule <IDENTIFIER> <ID> <MONITOR> <WORKSPACE>
+
+Arguments:
+  <IDENTIFIER>
+          [possible values: exe, class, title]
+
+  <ID>
+          Identifier as a string
+
+  <MONITOR>
+          Monitor index (zero-indexed)
+
+  <WORKSPACE>
+          Workspace index on the specified monitor (zero-indexed)
+
+Options:
+  -h, --help
+          Print help
+
+```