datafusion-cli: implement syntax highlighting for keywords/literals

### Is your feature request related to a problem or challenge?

Currently datafusion-cli has no colour. Adding syntax highlighting can improve usability/readability

### Describe the solution you'd like

Highlight SQL keywords and literals in different colours, at the minimum

### Describe alternatives you've considered

_No response_

### Additional context

Example of duckdb cli:


Could be useful: https://docs.rs/rustyline/latest/rustyline/highlight/trait.Highlighter.html

Start in the datafusion-cli implementation and read the rustyline Highlighter documentation linked in the issue. Identify how SQL input is handled, then add distinct highlighting for SQL keywords and literals and verify the CLI displays the colors correctly.

Written by the indexing model from the issue text.