feat(cli): add colorized output and improved formatting (#101)

* feat(cli): add colorized output and improved formatting

- Add colored output for different message types (errors red, success green, warnings yellow)
- Improve table formatting for SELECT results using comfy-table
- Add progress indicators for long operations using indicatif
- Add --json output format option via clap
- Improve help messages with ASCII banner and organized command reference

Closes #92

* fix(cli): address CodeRabbit review feedback

- Use env!(CARGO_PKG_VERSION) instead of hardcoded version string
- Fix double backslash in ASCII art banner
- Handle NaN/Infinity floats safely in JSON output
- Use unwrap_or_else for JSON serialization to prevent panics
- Insert null for missing column values in JSON output
- Use strip_prefix for safer string slicing (avoids byte offset issues)

* fix(cli): address remaining CodeRabbit review feedback

- Handle EOF on stdin to prevent infinite loop when piped

- Implement Display trait for Value to deduplicate format_value

- Use serde_json for safe JSON error fallback (proper escaping)

- Support case-insensitive ASK/EXPLAIN command matching

Signed-off-by: hargunsiingh <hsnarang45@gmail.com>

* style(cli): fix rustfmt formatting

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Signed-off-by: hargunsiingh <hsnarang45@gmail.com>

Author: hargunsiingh