Added parsers for ShowInterfacesCapabilities

[smitsialis]

Description

Add new parsers for Show Interfaces Capabilities

Motivation and Context

Not previously there and need to use it in my work

Impact (If any)

No impact

Screenshots:

Checklist:

• [x ] I have updated the changelog.
• [ ] I have updated the documentation (If applicable).
• [x ] I have added tests to cover my changes (If applicable).
• [x ] All new and existing tests passed.
• [x ] All new code passed compilation.

[smitsialis]

@GerriorL, @lsheikal, @danielgraziano
Hi, I've had this MR here for 3 wks and not seen any reviews. I've tried to add this code previous but had to do a new MR each time because the MR became too old to merge. Is there something different I should be doing? Thanks,