chore(GlNavbar): migrate stories to CSF
What does this MR do?
This MR...
- ...adds a
BootstrapComponent
doc block so that we can generate links to underlying BootstrapVue components documentation when needed. This essentially reproduces the logic that we had built forstorybook-readme
. - ...migrates
GlNavbar
stories to the Component Story Format.
Closes #1279 (closed)