Update README to document `--lang` CLI option

[naheel0]

Update README to document --lang CLI option

Description

The CLI now supports a --lang <code> option for both run and analyze commands, allowing users to receive error explanations in different languages.

The README should be updated to include:

• Usage examples for run and analyze with --lang
• Default behavior when --lang is not specified (English)
• Supported languages and their codes: en, hi, es, fr, de, zh, ja, pt
  Added the lang select option in 7 languages using lingo.dev added a f… #56
  v1.1.0 #59

Examples

# Run a file in Hindi
errlens run app.js --lang hi

# Analyze an error string in Spanish
errlens analyze "Cannot read properties of undefined" --lang es
---
#Goal

Help users understand and utilize the multilingual feature effectively.

[mahek395]

Hi @naheel0! I'd love to work on this. I'll update the README to document the --lang option for both run and analyze commands, including usage examples, default behavior, and supported language codes.