moving developer-only strings to api/common messages (#10258)

* move translatable string to apiMessages

* use apiMessages instead of res.t for groupIdRequired / keepOrRemove

* move pageMustBeNumber to apiMessages

* change apimessages

* move missingKeyParam to apiMessages

* move more strings to apiMessages

* fix lint

* revert lodash imports to fix tests

* fix webhook test

* fix test

* rollback key change of `keepOrRemove`

* remove unneeded `req.language` param

*  extract more messages from i18n

* add missing `missingTypeParam` message

* Split api- and commonMessages

* fix test

* fix sanity

* merge messages to an object, rename commonMessage to errorMessage

* apiMessages -> apiError, commonMessages -> errorMessage, extract messages to separate objects

* fix test

* module.exports

website/common/errors/commonErrorMessages.js

@@ -0,0 +1,18 @@
+// When this file grows, it can be split into multiple ones.
+module.exports = {
+  invalidAttribute: '"<%= attr %>" is not a valid Stat.',
+
+  statsObjectRequired: '"stats" update is required',
+
+  missingTypeParam: '"req.params.type" is required.',
+  missingKeyParam: '"req.params.key" is required.',
+  itemNotFound: 'Item "<%= key %>" not found.',
+  questNotFound: 'Quest "<%= key %>" not found.',
+  spellNotFound: 'Skill "<%= spellId %>" not found.',
+  invalidTypeEquip: '"type" must be one of "equipped", "pet", "mount", "costume"',
+  missingPetFoodFeed: '"pet" and "food" are required parameters.',
+  missingEggHatchingPotion: '"egg" and "hatchingPotion" are required parameters.',
+
+  invalidPetName: 'Invalid pet name supplied.',
+  invalidFoodName: 'Invalid food name supplied.',
+};