chore(cli): model fern definition in fern, instead of zod (#4957)

Author: dsinghvi

.eslintignore

@@ -11,6 +11,8 @@ packages/cli/api-importers/conjure/conjure-sdk/**
 packages/docs-config/**
 packages/cli/api-importers/openapi/openapi-ir/src/sdk/**
 packages/cli/configuration/src/docs-yml/schemas/**
+packages/cli/configuration/src/generators-yml/schemas/**
+packages/cli/fern-definition/schema/src/schemas/**
 packages/seed/**
 generators/typescript/utils/core-utilities/**
 seed/**

.github/workflows/ci.yml

@@ -29,8 +29,8 @@ jobs:
       - name: Lint
         run: pnpm lint:style
 
-      # - name: generate (dev) JSON Schema
-      #   run: pnpm generate-json-schema:dev
+      - name: Generate JSON Schema
+        run: pnpm jsonschema
 
       - name: Format
         run: pnpm format:check
@@ -48,7 +48,7 @@ jobs:
         uses: ./.github/actions/install
 
       - name: Compile
-        run: pnpm compile                
+        run: pnpm compile
 
   eslint:
     runs-on: ubuntu-latest
@@ -77,7 +77,7 @@ jobs:
 
       - uses: actions/setup-go@v5
         with:
-          go-version: 'stable'
+          go-version: "stable"
 
       - name: Install protoc-gen-openapi
         run: go install github.com/google/gnostic/cmd/[email protected]
@@ -99,7 +99,7 @@ jobs:
 
       - name: Install
         uses: ./.github/actions/install
-      
+
       - name: Compile
         run: pnpm compile
 
@@ -148,7 +148,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '20.x'
+          node-version: "20.x"
 
       - name: Check API definition is valid
         env: