no issue
- following on from f4fb0fcbaa,
this commit moves around some package requires in Ghost
- these are often niche packages that do something in a subsystem of
Ghost, and are not necessarily be needed to boot the application
- these packages use non-negligible CPU and memory when they are
required, so it makes sense to lazy-require them
- the concern here is that we obscure the code too much by moving
random requires further into code, but the changes are small and the
improvements big
- this commit bring the boot time since 4.19.0 down ~31% and initial
memory usage down by a total of ~12%
closes https://github.com/TryGhost/Team/issues/466
- upgraded kg-default-cards to include paywall card
- extracted `htmlToPlaintext` from post model to shared util for re-use
- updated post-gating to set html+plaintext to the free preview if a paywall card has been used
- re-generates plaintext from the truncated html using `htmlToPlaintext` util
- display free content in the `{{content}}` helper via the default CTA template
