feat(#197): add search to docs site

[Decipher]

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

• Adds @nuxt/content based search to the docs site
• Resolves Add search to documentation #197

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly. (PR: #)
• I have added tests to cover my changes (if not applicable, please state why)
• All new and existing tests are passing.

Screenshots/Media:

[changeset-bot]

⚠️ No Changeset found

Latest commit: ebe1c95

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[codecov]

Codecov Report

Merging #507 (32f1518) into develop (5c01b00) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #507   +/-   ##
========================================
  Coverage    97.08%   97.08%           
========================================
  Files           86       86           
  Lines         2195     2195           
  Branches       427      427           
========================================
  Hits          2131     2131           
  Misses          57       57           
  Partials         7        7           

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