chore: add README.md

Author: devwckd

cli/README.md

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+# torus-cli
+
+Torus blockchain cli using the torus client.
+
+## Available commands
+
+| Command | Description |
+| ------- | ----------- |
+| `torurs key list` | Lists all saved keys. |
+| `torurs key info <name>` | Prints information about a key prompting for the password if it is encrypted. |
+| `torurs key create <name> [-p]` | Generates a new sr25519 key and prompts for a encryption password if `-p` is given. |
+| `torurs key delete <name> [-y]` | Deletes a saved key. |
+| `torurs balance <account>` | Shows the account balance. |
+| `torurs balance check <account>` | Does the same as the command above. |
+| `torurs balance transfer <key> <target_account> <amount> [-y]` | Transfers **amount** from **key** to **address**. |
+| `torurs stake <account>` | Prints all keys **account** is staking with the amount. |
+| `torurs stake given <account>` | Does the same as the command above. |
+| `torurs stake received <account>` | Prints all keys **account** is staked by with the amount. |
+| `torurs stake add <key> <target_account> <amount> [-y]` | Stakes **target_account** with **amount** from **key**. |
+| `torurs stake remove <key> <target_account> <amount> [-y]` | Removes **amount** staked to **target_account** from **key**. |
+| `torurs stake transfer <key> <source_account> <target_account> <amount> [-y]` | Transfers **amount** **key** has staked on **source_account** to **target_account**. |
+
+> `--testnet` can be added in order to run the command on the testnet.  
+  
+> **address**: a ss58 address.  
+> **key**: The name of a saved key.  
+> **account**: either a ss58 address or the name of a saved key.  
+> [-y]: The confirmation prompt is auto accepted if it is provided.