refs: TryGhost/Toolbox#147
* Replaces all references to isIgnitionError with isGhostError
* Switches use of GhostError to InternalServerError - as GhostError is no longer public
There are places where InternalServerError is not the valid error, and new errors should be added to the @tryghost/errors package to ensure that we can use semantically correct errors in those cases.
refs https://linear.app/tryghost/issue/CORE-35/refactor-route-and-redirect-settings
- When the yaml parser is injected through a DI it's easier to test and later on the redirects service initialization would use same pattern with exactly the same yamlParse funciton
- Next step is getting yaml parser into an outside module
- Also simplified getSettingFilePath method while swapping to an updated yaml parser implementation. Now this method function is exactly like the one used in redirects
refs https://linear.app/tryghost/issue/CORE-35/refactor-route-and-redirect-settings
- It's a step to making the module follow class+DI pattern before fully extracting it into an external libarary
- Reminder, doing in Ghost repo instead of substituting big chunks all at once to have clear history of how the service evolved prior to the extraction into external lib!
