dendron.topic.publish.cli: example instructions are confusing

[l2dy]

#310 makes the Publish CLI page confusing as if an npx one-liner would work without context in the referenced page.

npx would not know that dendron is from @dendronhq/dendron-cli if it's not installed.

[hrmnjt]

Agreed. Suggestion as mentioned on #310 (comment)

Better would be to document behavior in both cases when a user does - npx install @dendronhq/dendron-cli or npx install -g @dendronhq/dendron-cli

I think #310 is causing inconsistencies on publish > cook > github and cli pages as well.