add ledger EVM instructions

docs/integrations/ledger/_category_.json

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+{
+  "label": "Ledger",
+  "position": 5
+}

docs/integrations/ledger/index.md

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+# Ledger

docs/integrations/ledger/ledger_EVM.md

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+---
+sidebar_position: 1
+title: Ledger EVM
+---
+
+## Using Astar and Shiden EVM Ledger apps with MetaMask
+
+## Intro
+
+**Astar EVM** and **Shiden EVM** apps are now available on Ledger hardware wallet devices. This means that MetaMask users can now sign transactions for EVM accounts on those networks using Ledger Nano S (plus) or Ledger X devices.
+
+This guide will show you how to set up Astar EVM and Shiden EVM on your Ledger hardware wallet and how to use it in combination with MetaMask.
+
+> **Note:**
+>
+> Photos are taken using Nano S Plus device, and the example shows interaction with Astar EVM app, but the process is the same with Nano S and Nano X devices, as well as Shiden EVM app.
+
+## Requirements
+
+### Your Ledger device is ready for use
+
+- [Make sure you have set up your Ledger device](https://support.ledger.com/hc/en-us/articles/360000613793?docs=true)
+- Update your device to latest firmware
+  - [Nano S](https://support.ledger.com/hc/en-us/articles/360002731113?docs=true)
+  - [Nano S Plus](https://support.ledger.com/hc/en-us/articles/4445777839901?docs=true)
+  - [Nano X](https://support.ledger.com/hc/en-us/articles/360013349800?docs=true)
+- [Download and install Ledger Live app for your OS](https://support.ledger.com/hc/en-us/articles/4404389606417-Download-and-install-Ledger-Live?docs=true)
+- [Download and install MetaMask for your browser](https://metamask.io/download/)
+
+### Astar/Shiden network set up on Metamask
+
+If you already have this, feel free to skip this part.
+
+1. In MetaMask menu navigate to Settings → Networks, and click “Add a network”
+2. Enter following details for Astar:
+   1. Network name: `Astar Network Mainnet`
+   2. New RPC URL: `https://rpc.astar.network:8545/`
+   3. Chain ID: `592`
+   4. Currency Symbol: `ASTR`
+   5. Block Explorer URL(Optional): `https://astar.subscan.io/`
+3. Click the “Save” button
+4. Repeat steps 1-3 for Shiden network with following details:
+   1. Network name: `Shiden Network Mainnet`
+   2. New RPC URL: `https://evm.shiden.astar.network/`
+   3. Chain ID: `336`
+   4. Currency Symbol: `SDN`
+   5. Block Explorer URL(Optional): `https://shiden.subscan.io/`
+5. Close the Settings menu and from the dropdown select the network you wish to interact with
+
+### Install apps to your Ledger device
+
+1. Open Ledger Live app and navigate to “Manager”
+2. Connect your Ledger Device and unlock it
+   1. If asked, confirm Ledger Manager on your device
+3. Search for “Astar EVM” or “Shiden EVM” in the app catalog
+4. Click install
+
+After this step, you should have one or both of these apps:
+
+<center>
+<div style={{display: 'flex', justifyContent: 'center'}}>
+<img src={require('@site/static/img/ledger/1-AstarEVM.jpg').default} style={{height: '200px',margin: '1px'}}/>
+
+<img src={require('@site/static/img/ledger/2-ShidenEVM.jpg').default} style={{height: '200px',margin: '1px'}}/>
+
+</div>
+</center>
+
+## Connecting your Ledger device to MetaMask
+
+1. In MetaMask menu select “Connect Hardware wallet:
+
+<center>
+<img src={require('@site/static/img/ledger/connect_hw_wallet.png').default} style={{height: "400px"}}/>
+</center>
+
+2. On the next screen select “Ledger” and click “Continue
+
+<center>
+<img src={require('@site/static/img/ledger/select_ledger.png').default} style={{height: "400px"}}/>
+</center>
+
+3. Pair and connect your Device when prompted by the browser:
+
+<center>
+<img src={require('@site/static/img/ledger/pair_hid.png').default} style={{height: "400px"}}/>
+</center>
+
+4. Select an account you wish to connect and click “Unlock”
+
+<center>
+<img src={require('@site/static/img/ledger/select_acc.png').default} style={{height: "400px"}}/>
+</center>
+
+5. You should now see your account and balance:
+
+<center>
+<img src={require('@site/static/img/ledger/acc_balance.png').default} style={{height: "400px"}}/>
+</center>
+
+# Receiving tokens
+
+To receive tokens, copy the address of your connected account by clicking your account name in MetaMask header, and send some tokens to that address from your preferred source.
+
+# Sending tokens
+
+1. In MetaMask click “Send” button and enter the address you wish to send to
+2. Enter the amount to send and click “Next”
+3. Connect your Ledger device and unlock it. Due to MetaMask limitations, it will prompt you to open Ethereum App. Ignore this and open Astar EVM app.
+
+<center>
+<img src={require('@site/static/img/ledger/confirm_tx.png').default} style={{height: "400px"}}/>
+</center>
+
+4. When your Ledger device screen is showing “Application is ready”, click “Confirm” in MetaMask
+
+<center>
+<img src={require('@site/static/img/ledger/3-ApplicationIsReady.jpg').default} style={{height: '200px',margin: '1px'}}/>
+</center>
+
+5. Review the transaction on your Ledger device:
+
+<center>
+<img src={require('@site/static/img/ledger/4-ReviewTransaction.jpg').default} style={{height: '200px',margin: '1px'}}/>
+</center>
+
+    a) Check amount:
+
+<center>
+<img src={require('@site/static/img/ledger/5-AmountASTR1.jpg').default} style={{height: '200px',margin: '1px'}}/>
+</center>
+
+    b) Check receiving address:
+
+<center>
+<img src={require('@site/static/img/ledger/6-Address.jpg').default} style={{height: '200px',margin: '1px'}}/>
+</center>
+
+    c) Check network:
+
+<center>
+<img src={require('@site/static/img/ledger/7-Network_Astar.jpg').default} style={{height: '200px',margin: '1px'}}/>
+</center>
+
+    d) Check Fees:
+
+<center>
+<img src={require('@site/static/img/ledger/9-MaxFees_ASTR.jpg').default} style={{height: '200px',margin: '1px'}}/>
+</center>
+
+    e) Either approve or reject the transaction:
+
+<center>
+<div style={{display: 'flex', justifyContent: 'center'}}>
+<img src={require('@site/static/img/ledger/11-AcceptAndSend.jpg').default} style={{height: '200px',margin: '1px'}}/>
+
+<img src={require('@site/static/img/ledger/12-Reject.jpg').default} style={{height: '200px',margin: '1px'}}/>
+
+</div>
+</center>
+
+6. Check the transaction result in MetaMask “Activity” tab.
+
+## Interacting with smart contracts
+
+In order to interact with smart contracts, you need to enable blind signing in the Astar EVM app on your Ledger device:
+
+1. Open the app
+2. Navigate to “Settings” and confirm
+3. Confirm the “Blind signing” option, so it turns to “Enabled”
+4. Navigate to “Back” and confirm