feat: openapi import from cli

[pooja-bruno]

Description

Changes

CLI Integration

• Added OpenAPI import functionality to Bruno CLI
• Implemented command line interface for importing OpenAPI specifications
• Added support for both JSON and YAML OpenAPI file formats

Features

• New CLI command: bru import with the following options:
  • -t, --type: Specify import type
  • -s, --source: Source file path
  • -o, --output: Output directory path (optional)

Contribution Checklist:

• [x] The pull request only addresses one issue or adds one feature.
• [x] The pull request does not introduce any breaking changes
• [ ] I have added screenshots or gifs to help explain the change if applicable.
• [x] I have read the contribution guidelines.
• [x] Create an issue and link to the pull request.

[anusree-bruno]

Closes issue https://github.com/usebruno/bruno/issues/1109