Add the PDK nav to the docs nav - Kong

Prerequisites:

cd kong-root-repo
make dev
git checkout branch/tag/release

Generate everything:

cd kong-root-repo
./scripts/autodoc

You can then copy the generated files to the docs.konghq.com repo manually, as follows:

cp autodoc/output/nav/docs_nav.yml.admin-api.in  ../docs.konghq.com/autodoc-nav/docs_nav_$xyxversion.yml.admin-api.in

cp autodoc/output/cli.md ../docs.konghq.com/app/$xyxversion/cli.md

cp autodoc/output/configuration.md ../docs.konghq.com/app/$xyxversion/configuration.md

cp -r autodoc/output/pdk ../docs.konghq.com/app/$xyxversion/pdk

# Add the PDK nav to the docs nav
vim ../docs.konghq.com/app/_data/docs_nav_$xyxversion.yml
<add the contents of autodoc/output/_pdk_nav.yml in the "Plugin Development Kit" section