feat: implement dropdown for social media in other-details step

[snitin315]

Fixes #4610

Short description of what this resolves:

• Offer a dropdown menu of all kinds of social media services and require the user to only fill in the user name.
• Change the name "External Event URL" to "Website"

Changes proposed in this pull request:

Checklist

• I have read the Contribution & Best practices Guide.
• My branch is up-to-date with the Upstream development branch.
• The acceptance, integration, unit tests and linter pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

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[codecov]

Codecov Report

Merging #4924 into development will increase coverage by 0.04%.
The diff coverage is 0.00%.

@@               Coverage Diff               @@
##           development    #4924      +/-   ##
===============================================
+ Coverage        22.85%   22.90%   +0.04%     
===============================================
  Files              483      483              
  Lines             5123     5125       +2     
  Branches            18       18              
===============================================
+ Hits              1171     1174       +3     
+ Misses            3948     3947       -1     
  Partials             4        4              

Impacted Files	Coverage Δ
app/components/forms/wizard/other-details-step.js	0.00% <ø> (ø)
app/components/widgets/forms/link-input.js	32.00% <0.00%> (-10.11%)	⬇️
app/utils/computed-helpers.js	21.95% <0.00%> (-0.55%)	⬇️
app/components/tabbed-navigation.js	53.33% <0.00%> (+20.00%)	⬆️

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[iamareebjamal]

There shouldn't be a dropdown on the right field

[iamareebjamal]

@snitin315 Please rebase as basic details step has been split into 2

[snitin315]

Resolving conflicts 👍🏻

[snitin315]

[iamareebjamal]

Great work