WS-2323 - Add Language Script Switch to New Navigation Dual Script Language Services

[pvaliani]

Resolves JIRA: https://bbc.atlassian.net/browse/WS-2430

Summary

• Adds the language script switching button support to the new Navigation bar for serbian, ukchina (articles only), zhongwen and uzbek
• Script switch button has been refreshed according to updated UX designs
• Updates ukchina brand SVG (other service brand svgs to be done in other tickets)

Code changes

• See files changed

Testing

• Run Simorgh and navigate to http://localhost:7081/ukchina/simp/articles/c0e8weny66ko adjusting breakpoints will show the script switch button at different layouts

Useful Links

• Coding Standards
• Repository use guidelines
• Add Links to useful resources related to this PR if applicable.