Add legacy rps

.github/workflows/validation.yml

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+name: registry format validation
+on:
+  pull_request:
+    types: [opened, synchronize]
+jobs:
+    lint:
+        runs-on: ubuntu-latest
+        steps:
+            - name: Checkout code
+              uses: actions/checkout@v2
+            - name: Install dependencies
+              run: npm install
+            - name: Validate registry format
+              run: npm run test

.gitignore

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+
+# Dependency directories
+node_modules/

.prettierignore

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+# Ignore all Markdown files:
+**/*.md
+

.prettierrc

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+{
+    "semi": false,
+    "overrides": [
+      {
+        "files": "*.sol",
+        "options": {
+          "bracketSpacing": false,
+          "printWidth": 145,
+          "tabWidth": 4,
+          "useTabs": false,
+          "singleQuote": false,
+          "explicitTypes": "always"
+        }
+      },
+      {
+        "files": "*.ts",
+        "options": {
+          "printWidth": 120,
+          "tabWidth": 4,
+          "singleQuote": true,
+          "trailingComma": "all"
+        }
+      }
+    ]
+  }