feat: add --web to glab ci view command

Description

This MR adds the --web option (similar to glab mr view --web) so users can directly jump into the pipeline page.

Related Issues

Resolves #7406 (closed)

How has this been tested?

I tested locally by compiling the binary and running inside repositories. I'm happy to add further unit tests or whatever is needed.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation
• Chore (Related to CI or Packaging to platforms)
• Test gap