closes TryGhost/Team#1626

- getLazyRelation is a safer shorthand for `model.related('relationName').fetch()`
- prevents doing a `fetch` operation on a relation that is already loaded, which can cause issues when `formatOnWrite` has a custom implementation
- uses the already loaded relation if it exists, or loads the relation
- doesn't reload if already loaded
- reload is forceable using the forceRefresh option

fixes TryGhost/Toolbox#284

- this section of code rewrites `/tmp` in the SQlite filename to the
  temp dir
- the fix was only intended for Windows environments, because they
  typically don't have a `/tmp` dir
- this commit adds a `process.platform` check for Windows
- it also moves the code into the DB connection file instead of the
  config lib

closes TryGhost/Team#1632

no issue

Some tests timeout for an unknown reason. This commit adds some missing awaits for async test methods (that don't perform any async operation, but are marked as async).

fixes TryGhost/Team#1652
fixes #13319

**Image formatting**
Added support for changing the format of images via the `handle-image-sizes` middleware (e.g. format SVG to png, jpeg, webp)

This change was required:
- Not all browsers support SVG favicons, so we need to convert them to PNGs
- We can't fit image resizing and formatting in the `serve-favicon` middleware: we need to store the resized image to avoid resizing on every request. This system was already present in the `handle-image-sizes` middleware.

To format an uploaded image:
- Original URL: https://localhost/blog/content/images/2022/05/giphy.gif
- To resize: https://localhost/blog/content/images/size/w256h256/2022/05/giphy.gif (already supported)
- To resize and format to webp: https://localhost/blog/content/images/size/w256h256/format/webp/2022/05/giphy.gif
- Animations are preserved when converting Gifs to Webp and in reverse, and also when only resizing (#13319)

**Favicons**
- Custom favicons are no longer served via `/favicon.png` or `/favicon.ico` (only for default favicon), but use their full path
- Added support for uploading more image extensions in Ghost as a favicon: .jpg, .jpeg, .gif, .webp and .svg are now supported (already supported .png and .ico).
- File extensions other than jpg/jpeg, png, or ico will always get transformed to the image/png format to guarantee browser support (webp and svg images are not yet supported as favicons by all browsers).

For all image formats, other than .ico files:
- Allowed to upload images larger than 1000px in width and height, they will get cropped to 256x256px.
- Allowed uploading favicons that are not square. They will get cropped automatically.
- Allowed to upload larger files, up to 20MB (will get served at a lower file size after being resized)

For .svg files:
- The minimum size of 60x60px is no longer required.

For .ico files:
- The file size limit is increased to 200kb (coming from 100kb)

closes: #14365
closes: TryGhost/SDK#366
closes: TryGhost/SDK#389
refs: TryGhost/SDK#431

- our word count helper has been updated to handle RTL languages
- this should also fix the reading time as it uses the same underlying function

Co-authored-by: Emmanuel-Melon <emmanuelgatwech@gmail.com>

closes: #10042
closes: #14206

- the fact that pages are exposed as .page in dynamic routing has never played nicely
- this fix changes nothing in the tests - which shows this was never a covered case
- ideally I should add some tests, but for now this tiny change should prevent a lot of dynamic routing pain
- note, it doesn't remove .page, it just adds .post, so both work

refs: 4fa412c

- this was done in the referenced commit

… invites

closes TryGhost/Team#1501

- Staff invites previously came from the default site from-address, which is often a noreply

refs: https://forum.ghost.org/t/gscan-not-picking-up-some-products-incompatibilities-for-5-0/30394/4
closes: TryGhost/Team#1653

- gscan wasn't running the new linter-based rules on anything in a folder

- This PR was created by deleting all .snap files & running the tests
- The result is that all tests that have been removed or renamed have had their now-unused snaps deleted

v5.0.2

refs TryGhost/Team#1616

- Removed all GA feature flags
- Removed `tweetGridCard` alpha flag
- Changes to `members-api` and `members-importer` packages: TryGhost/Members@@tryghost/members-api@8.1.1...@tryghost/members-api@8.1.2

refs TryGhost/Toolbox#308
refs 0f5c22a

- There is no concept of "subscriber" in the codebase any longer. Keeping removed webhooks around does not make sense

no issue

- There is no concept of single author in the codebase, so having it documented doesn't make sense

refs #14870
refs TryGhost/Members#400

- Since the ref'd PRs, this method is no longer used

…#14912)


We have to update the output serializer to only clean includes for the
Admin API, so that these includes aren't stripped for not being in the
original include query param.

This also rejigs the other Content API only logic to sit together in
the input serializer.

refs TryGhost/Team#1650

Since we introduced calculated settings, we need to return all settings when editing a setting, because those calculated settings can change.

- When editing settings, return all the settings. Previously we didn't include the calculated settings (which caused issues with admin not having up to date values for those)
- Updated Stripe <head> script to be injected based on the calculated settings

Required for TryGhost/Admin#2405