add llms.txt & llms-full.txt script (wasp-lang#422)

* add llms.txt

* Update index.mdx

Author: vincanger

.github/workflows/blog-deployment.yml

@@ -29,6 +29,10 @@ jobs:
       working-directory: ./opensaas-sh/blog
       run: npm install
 
+    - name: Generate LLM files
+      working-directory: ./opensaas-sh/blog
+      run: npm run generate-llm-files
+
     - name: Build site
       working-directory: ./opensaas-sh/blog
       run: npm run build
@@ -49,6 +53,10 @@ jobs:
       working-directory: ./opensaas-sh/blog
       run: npm install
 
+    - name: Generate LLM files
+      working-directory: ./opensaas-sh/blog
+      run: npm run generate-llm-files
+
     - name: Build site
       working-directory: ./opensaas-sh/blog
       run: npm run build