chore(#175): update guide pages

[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)
• Other

Description

Test environment: https://app.feature-175-guide.druxtjs-org.au2.amazee.io

• Updated Getting started with DruxtSite
• Updated Getting started with Druxt.js
• Updated Theming guide
• Fixed links
• Resolved Update Guide content #175

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: e09b15d

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.

This PR includes no changesets

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[codecov]

Codecov Report

Merging #270 (e09b15d) into develop (9741e11) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #270   +/-   ##
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  Coverage    96.34%   96.34%           
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  Files           88       88           
  Lines         2765     2765           
  Branches       566      566           
========================================
  Hits          2664     2664           
  Misses          91       91           
  Partials        10       10           

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