Improve Client CLI help readability (#2073)

Currently the CLI `-h/--help` commad output is almost unreadable as (for
some commands) it:
- doesn't provide a short brief of what the command does.
- doesn't separate the options description in smaller paragraphs.
- doesn't use a smart wrap strategy for lines longer than the number of
columns in the terminal.

Follow some pics taken with a 100 cols wide term

## Short help (./node -h)

### Before


![20231028-174531-grim](https://github.com/paritytech/polkadot-sdk/assets/8143589/11b62c3c-dcd5-43f4-ac58-f1b299e3f4b9)

### After


![20231028-175041-grim](https://github.com/paritytech/polkadot-sdk/assets/8143589/dc08f6fd-b287-40fb-8b33-71a185922104)


## Long help (./node --help)

### Before


![20231028-175257-grim](https://github.com/paritytech/polkadot-sdk/assets/8143589/9ebdc0ae-54ee-4760-b873-a7e813523cb6)

### After


![20231028-175155-grim](https://github.com/paritytech/polkadot-sdk/assets/8143589/69cbe5cb-eb2f-46a5-8ebf-76c0cf8c4bad)

---------

Co-authored-by: command-bot <>

substrate/client/cli/src/params/telemetry_params.rs

@@ -22,14 +22,17 @@ use clap::Args;
 #[derive(Debug, Clone, Args)]
 pub struct TelemetryParams {
 	/// Disable connecting to the Substrate telemetry server.
+	///
 	/// Telemetry is on by default on global chains.
 	#[arg(long)]
 	pub no_telemetry: bool,
 
 	/// The URL of the telemetry server to connect to.
+	///
 	/// This flag can be passed multiple times as a means to specify multiple
 	/// telemetry endpoints. Verbosity levels range from 0-9, with 0 denoting
 	/// the least verbosity.
+	///
 	/// Expected format is 'URL VERBOSITY', e.g. `--telemetry-url 'wss://foo/bar 0'`.
 	#[arg(long = "telemetry-url", value_name = "URL VERBOSITY", value_parser = parse_telemetry_endpoints)]
 	pub telemetry_endpoints: Vec<(String, u8)>,