feat(pretty-fmt): update README for pretty flag

- update README for `--pretty` flag
- update CHANGELOG

Author: tvpeter

CHANGELOG.md

@@ -5,6 +5,8 @@ page. See [DEVELOPMENT_CYCLE.md](DEVELOPMENT_CYCLE.md) for more details.
 
 ## [Unreleased]
 
+- Add `--pretty` top level flag for formatting commands output in a tabular format
+
 ## [1.0.0]
 
 - Changed the MSRV to 1.75.0 and bumped the rust edition to 2021

README.md

@@ -195,6 +195,16 @@ Note: You can modify the `Justfile` to reflect your nodes' configuration values.
    cargo run --features rpc -- wallet -u "127.0.0.1:18443" -c rpc -a user:password balance
    ```
 
+## Formatting Responses using `--pretty` flag
+
+You can optionally return outputs of commands in  human-readable, tabular format instead of `JSON`. To enable this option, simply add the `--pretty` flag as a top level flag. For instance, you wallet's balance in a pretty format, you can run:
+
+```shell
+cargo run --pretty -n signet wallet -w {wallet_name} -d sqlite balance
+```
+
+This is available for wallet, key, repl and compile features. When ommitted, outputs default to `JSON`.
+
 ## Minimum Supported Rust Version (MSRV)
 
 This library should always compile with any valid combination of features on Rust **1.75.0**.