chore: import upstream snapshot with attribution

integrations/sendgrid/definitions/common.ts

@@ -0,0 +1,18 @@
+import { z } from '@botpress/sdk'
+
+/** A string that must contain at least 1 non-whitespace character.
+ *
+ *  @remark This can still be an optional field */
+export const NonBlankString = z.string().trim().min(1)
+
+/** A common description that should apply to all Email Address Fields.
+ *
+ *  @remark Using this constant so it can be re-used in multiple other schemas.
+ *   This is because the linter doesn't detect the "describe" if I were to bind
+ *   it to the "EmailAddressSchema" definition */
+export const EMAIL_ADDRESS_DESCRIPTION = 'The email address of the correspondent (e.g. example@example.com)'
+
+/** A string that has been verified to be a valid email address.
+ *
+ *  @remark "correspondent" can refer to both the sender and the receiver of an email. */
+export const EmailAddressSchema = NonBlankString.email()