feat(config): adding base command synced with toml file (#8)

## Motivation

![image](https://github.com/user-attachments/assets/43c3dd12-f952-4b72-8165-685a616392a5)

CQLsh has as a basis a config file that you can use and we should do the
same to make it easier for testing purposes.

When the application start, it will be checking at
`~/.config/scyllash/config.toml` and if it doesn't exists, the app will
create one as a basis to use cloning the `default_config.toml`:

```toml
[connection]
hostname = "127.0.0.1"
port = 9042
username = "scylla"
password = ""
timeout = 10
```

Clap is an addition to further features which can fit together, like a
profile configuration however this we can discuss in another issue.

.gitignore

@@ -1 +1,2 @@
 /target
+.idea

Cargo.toml

@@ -5,8 +5,11 @@ edition = "2021"
 
 [dependencies]
 chrono = "0.4.38"
+clap = { version = "4.5.16", features = ["derive"] }
 color-eyre = "0.6.3"
 ratatui = { version = "0.28.0", features = ["all-widgets"] }
 scylla = "0.13.2"
+serde = { version = "1.0.208", features = ["derive"] }
 tokio = { version = "1.39.3", features = ["full"] }
+toml = "0.8.19"
 uuid = { version = "1.10.0", features = ["v1", "v4"] }