Added Contrct creation chapter.

Author: DariuszDepta

docs/tutorial/writing-contracts/_category_.json

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+{
+  "label": "Writing contracts",
+  "position": 1,
+  "link": {
+    "type": "doc",
+    "id": "introduction"
+  }
+}

docs/tutorial/writing-contracts/contract-creation.md

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+---
+sidebar_position: 1
+---
+
+# Contract creation
+
+The easiest and recommended way to start working on a new CøsmWasm contract is to generate it from
+the [`cw-template`](https://github.com/CosmWasm/cw-template).
+
+```shell title="terminal"
+cargo generate CosmWasm/cw-template
+```
+
+The [`cw-template`](https://github.com/CosmWasm/cw-template) will generate a lot of code for you.
+Because this tutorial aims to guide you step-by-step through the process of creating your first
+contract, for now, we will omit the use of the template and show you how to create it from the start.
+
+## New project
+
+As smart contracts are Rust library crates, we will start with creating one:
+
+```shell title="terminal"
+cargo new --lib ./contract
+```
+
+You created a simple Rust library, but it is not yet ready to be a smart contract.
+The first thing to do is to update the **Cargo.toml** file:
+
+```toml title="Cargo.toml"
+[package]
+name = "contract"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+cosmwasm-std = { version = "3", features = ["staking"] }
+```
+
+As you can see, we have added a `crate-type` field in the library section. Generating the `cdylib` is
+required to create a proper web assembly binary. The downside of this is that such a library cannot
+be used as a dependency for other Rust crates. For now, it is not needed, but later we will show
+how to approach reusing contracts as dependencies.
+
+Additionally, there is one core dependency for smart contracts: the
+[`cosmwasm-std`](https://docs.rs/cosmwasm-std/latest/cosmwasm_std/). This crate is a standard
+library for smart contracts. It provides essential utilities for communication with the outside
+world and a couple of helper functions and types. Every smart contract we will build will use this
+dependency.

docs/tutorial/writing-contracts/introduction.md

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+# Writing CøsmWasm contracts
+
+This section is a step-by-step guide on how to write CøsmWasm contracts.