feat: introduce gql schema sdl generation to the backend (#35)

* feat: introduce gql schema sdl generation to the backend

* chore: update gql-codegen consumers to get schema from generated sdl

* chore: hoppscotch-backend generates gql sdl on postinstall

* fix: add back missed part of generate-gql-sdl script

* chore: updated generate sdl script to hardcode whitelisted domains

* chore: add prisma generate on postinstall script

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Co-authored-by: ankitsridhar16 <ankit.sridhar16@gmail.com>

packages/hoppscotch-common/gql-codegen.yml

@@ -1,6 +1,5 @@
 overwrite: true
-schema:
-  - ${VITE_BACKEND_GQL_URL}
+schema: "../../gql-gen/*.gql"
 generates:
   src/helpers/backend/graphql.ts:
     documents: "src/**/*.graphql"