example: add cli demo

examples/cli/apibara.config.ts

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+import { defaultSink } from "@apibara/indexer";
+import { defineConfig } from "apibara/config";
+
+export default defineConfig({
+  runtimeConfig: {
+    test: 123,
+    check: "something",
+  },
+  presets: {
+    dev: {
+      runtimeConfig: {
+        test: 999,
+      },
+    },
+  },
+  sink: {
+    default: () => defaultSink(),
+  },
+});

examples/cli/indexers/starknet.indexer.ts

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+import { defineIndexer } from "@apibara/indexer";
+import { StarknetStream } from "@apibara/starknet";
+import type { ApibaraRuntimeConfig } from "apibara/types";
+import { hash } from "starknet";
+
+export default function (runtimeConfig: ApibaraRuntimeConfig) {
+  console.log("--> Starknet Indexer Runtime Config: ", runtimeConfig);
+  return defineIndexer(StarknetStream)({
+    streamUrl: "https://starknet.preview.apibara.org",
+    finality: "accepted",
+    startingCursor: {
+      orderKey: 80_000n,
+    },
+    filter: {
+      events: [
+        {
+          address:
+            "0x049d36570d4e46f48e99674bd3fcc84644ddd6b96f7c741b1562b82f9e004dc7" as `0x${string}`,
+          keys: [hash.getSelectorFromName("Transfer") as `0x${string}`],
+          includeReceipt: true,
+        },
+      ],
+    },
+    async transform({ block: { header } }) {
+      console.log("Transforming block ", header?.blockNumber);
+    },
+    hooks: {
+      "handler:after": ({ endCursor }) => {
+        console.log("Handler After ", endCursor?.orderKey);
+      },
+    },
+  });
+}

examples/cli/package.json

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+{
+  "name": "indexer",
+  "version": "1.0.0",
+  "description": "",
+  "scripts": {},
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "@types/node": "^20.5.2",
+    "typescript": "^5.6.2"
+  },
+  "dependencies": {
+    "@apibara/indexer": "workspace:*",
+    "@apibara/protocol": "workspace:*",
+    "@apibara/starknet": "workspace:*",
+    "apibara": "workspace:*",
+    "starknet": "^6.11.0"
+  }
+}

examples/cli/tsconfig.json

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+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "display": "Default",
+  "compilerOptions": {
+    "composite": false,
+    "declaration": true,
+    "declarationMap": true,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "inlineSources": false,
+    "preserveWatchOutput": true,
+    "target": "ES2022",
+    "lib": ["ES2023"],
+    "module": "ESNext",
+    "skipLibCheck": true,
+    "types": ["node"],
+    "moduleResolution": "bundler",
+    "isolatedModules": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true,
+    "sourceMap": true,
+    "outDir": "./dist",
+    "baseUrl": "."
+  },
+  "exclude": ["node_modules", "dist"]
+}