feat(cli): add doc-engine-cli to CLI Development

Adding `doc-engine-cli` to the `cli-helpers` category. 

It is a zero-config, highly performant CLI tool that transforms any Markdown file into a premium, academic-grade PDF. It uses a pure Python Markdown AST parser (`mistune`) and compiles directly to PDF via `typst` bindings, removing the heavy dependency on external LaTeX setups.

I've included the PyPI ID so the metrics can be automatically tracked. Thank you for maintaining this awesome list!

Author: leonardosalasd

projects.yaml

@@ -325,6 +325,10 @@ projects:
     category: cli-helpers
     pypi_id: click
     conda_id: conda-forge/click
+  - name: doc-engine-cli
+    github_id: leonardosalasd/doc-engine-cli
+    category: cli-helpers
+    pypi_id: doc-engine-cli
   - name: minify-obfuscate-cli
     github_id: leonardosalasd/minify-obfuscate-cli
     category: cli-helpers