Implement CLI functionality and enhance README instructions

README.md

@@ -53,6 +53,37 @@ pip install requests textual
 python run.py
 ```
 
+Or install the command locally:
+
+```bash
+pip install -e .
+```
+
+Launch the Textual UI:
+
+```bash
+checkaddy
+```
+
+Check an address directly in the terminal:
+
+```bash
+checkaddy <address> --coin BTC
+```
+
+If the address format maps to exactly one supported network, `--coin` can be omitted:
+
+```bash
+checkaddy <address>
+```
+
+For EVM addresses and legacy formats that can belong to multiple networks, pass the network explicitly:
+
+```bash
+checkaddy 0x0000000000000000000000000000000000000000 --coin ETH
+checkaddy 0x0000000000000000000000000000000000000000 --coin MATIC --json
+```
+
 ## Notes
 
 - Only public wallet addresses are supported.