fix(add_docs): populate the full key on options

[oraNod]

Noticed when reviewing ansible-collections/amazon.ai#54

When generating RST docs with tox -e add_docs the resulting files contain id="parameter-" and href="#parameter-". This results in broken HTML anchor IDs.

This change populates full_key on options before passing them to the template. This ensures that IDs use value.full_key as expected from the template, as seen here:

collection_prep/collection_prep/cmd/plugin.rst.j2

Line 110 in cfc5cb3

<div class="ansibleOptionAnchor" id="parameter-{% for part in value.full_key %}@{ part }@{% if not loop.last %}/{% endif %}{% endfor %}"></div>

[oraNod]

CI failing due to out of date pre-commit hooks. Fixed with #100