Add scripts to process and aggregate chains (#125)

* Create scripts to deploy

* Add README

_api/.gitignore

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+node_modules
+dist

_api/README.md

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+# Chain Registry Deployment Scripts
+
+### Overview
+
+This repository contains scripts to deploy static files from the `_api/dist` directory. The scripts perform the following tasks:
+
+1. Copy original files to the `dist` directory.
+2. Update URLs in `chain.json` and `assetlist.json` files.
+3. Aggregate `chain.json` files into a single `chains.json` file by extracting specific properties.
+
+### Usage
+
+Set the `ROOT_DIR` environment variable to specify the network type (e.g., `testnets`, `devnets`).
+
+Run the script:
+
+```sh
+pnpm build
+```
+
+or
+
+```sh
+ROOT_DIR=testnets pnpm build
+```

_api/package.json

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+{
+  "scripts": {
+    "build": "tsx src/main.ts"
+  },
+  "devDependencies": {
+    "@initia/initia-registry-types": "^0.0.17",
+    "@tsconfig/recommended": "^1.0.6",
+    "@types/node": "^20.14.8",
+    "@types/ramda": "^0.30.0",
+    "ramda": "^0.30.1",
+    "tsx": "^4.15.7"
+  }
+}