init with README

Author: Flouse

.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?

README.md

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+# Tutorial Target
+The target of this tutorial is very simple: use [Lumos](https://github.com/ckb-js/lumos) to write "Common Knowledge: Hello world!" into a cell on CKB testnet and check it on CKB explorer.
+
+TODO: In this tutorial, a browser-based runtime called [WebContainers](https://webcontainers.io/) is leveraged to create a minimal development environment only in the browser to acheive interactive tutorial experiences. Let's use the latest web capabilities to deliver a nice browser-based development experience for a new generation of interactive courses.
+
+## Prerequisites
+1. Node.js
+   ....
+
+2. Lomos
+Lumos provides a high-level API for interacting with CKB, which makes it easier to develop dApps.
+You can install Lumos by running the following command:
+
+```bash
+npm install @ckb-lumos/base @ckb-lumos/indexer @ckb-lumos/common @ckb-lumos/hd-indexer @ckb-lumos/transaction @ckb-lumos/wallet
+```
+
+## Pseudo Code
+After installing Lumos, you can use it to send a transaction to CKB testnet, write a simple `Common Knowledge`: "Hello World" into a [cell](https://docs.nervos.org/docs/reference/cell/) on CKB.
+Here's an example of how you can do that:
+
+```js
+const { RPC } = require("@ckb-lumos/rpc");
+const { Reader } = require("ckb-js-toolkit");
+const { CellCollector } = require("@ckb-lumos/indexer");
+const { generateAddress, key } = require("@ckb-lumos/hd-wallet");
+const { sealTransaction } = require("@ckb-lumos/helpers");
+const { Script } = require("@ckb-lumos/base");
+
+// create a new RPC instance pointing to a CKB node
+const rpc = new RPC("https://testnet.ckb.dev/rpc");
+
+// create a new key
+const privateKey = key.generatePrivateKey();
+const publicKey = key.publicKeyFromPrivate(privateKey);
+
+// generate an address from the public key
+const address = generateAddress(publicKey);
+
+// define the lock script for the cell
+const lockScript = new Script({
+  code_hash: "0x0000000000000000000000000000000000000000000000000000000000000000",
+  hash_type: "type",
+  args: address,
+});
+
+// define the type script for the cell
+const typeScript = new Script({
+  code_hash: "0x0000000000000000000000000000000000000000000000000000000000000000",
+  hash_type: "type",
+  args: new Reader("0x"),
+});
+
+// create a new transaction that adds a cell with the message "Common Knowledge: Hello world!"
+const tx = {
+  version: "0x0",
+  cell_deps: [],
+  header_deps: [],
+  inputs: [],
+  outputs: [
+    {
+      capacity: "0x" + BigInt(10000000000).toString(16),
+      lock: lockScript,
+      type: typeScript,
+    },
+  ],
+  witnesses: [],
+  outputs_data: [new Reader("0x" + Buffer.from("Common Knowledge: Hello world!").toString("hex")).serializeJson()],
+};
+
+// sign the transaction with the private key
+const signedTx = sealTransaction(tx, [privateKey]);
+
+// send the transaction to the CKB node
+const txHash = await rpc.sendTransaction(signedTx);
+
+console.log(`Transaction sent with hash: \${txHash}`);
+```
+
+## TODO
+- [ ] interactive tutorial experiences