@/commons-ui-next/Link App Router support

[kilemensi]

Description

The current @commons-ui/next/Link depends on useRouter from Next.js Pages Router application. This means an error is thrown when the component is used in an App Router application.

This PR fixes this by:

1. Moving all Pages Router specific features from Link to the PagesRouterLink component.
2. Renaming Link to StyledLink component keeping only Next/Link and @mui/material/Link functionality
3. Exports PagesRouterLink as default Link component to ensure no existing app is broken.
4. Exports both PagesRouterLink and StyledLink as components that can be imported from @commons-i/next package
5. Uses StyledLink in @/engineeringblog app.

Type of change

• Chore

Screenshots

N/A

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas

[github-actions]

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[kelvinkipruto]

LGTM