ip/v6 static routes documentation and metric

[xaviramon]

Change Summary

1. IPv4 static routes documentation increased with missing variables.
2. IPv6 static routes documentation developed based on IPv4.
3. IPv4 and IPv6 metric EOS command included.

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)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Documentation content changes
• Other (please describe):

Related Issue(s)

Fixes #278

Component(s) name

Proposed changes

How to test

Checklist:

• I have read the CONTRIBUTING document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• All new and existing tests passed (pre-commit, make linting and make sanity-lint).
• I have updated molecule CI testing accordingly

[titom73]

LGTM!