fix(addon-editor): use starterKit only from custom extension

[splincode]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows Conventional Commits
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Refactoring
• Code style update
• Build or CI related changes
• Documentation content changes

What is the current behavior?

Closes UIKIT-6091

Does this PR introduce a breaking change?

• Yes
• No

[lumberjack-bot]

Pull request was closed ✔️

All saved screenshots (for current PR) were deleted 🗑️

[github-actions]

Visit the preview URL for this PR (updated for commit d48d250):

https://taiga-ui--pr2845-splincode-fix-issues-1z73cb0m.web.app

_{(expires Tue, 11 Oct 2022 09:23:49 GMT)}

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[codecov]

Codecov Report

Base: 39.93% // Head: 39.93% // No change to project coverage 👍

Coverage data is based on head (d48d250) compared to base (307b068).
Patch coverage: 55.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2845   +/-   ##
=======================================
  Coverage   39.93%   39.93%           
=======================================
  Files         959      959           
  Lines        9257     9257           
  Branches     1901     1901           
=======================================
  Hits         3697     3697           
  Misses       5356     5356           
  Partials      204      204           

Flag	Coverage Δ
addon-charts	73.77% <ø> (ø)
addon-doc	18.72% <ø> (ø)
addon-editor	28.64% <55.00%> (ø)
addon-mobile	∅ <ø> (∅)
addon-table	83.78% <ø> (ø)
addon-tablebars	∅ <ø> (∅)
cdk	62.87% <ø> (ø)
core	60.90% <ø> (ø)
kit	19.21% <ø> (ø)
summary	39.93% <55.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...or/extensions/background-color/background-color.ts	18.18% <ø> (ø)
...s/addon-editor/extensions/font-color/font-color.ts	18.18% <ø> (ø)
...editor/extensions/indent-outdent/indent-outdent.ts	20.00% <ø> (ø)
...addon-editor/extensions/starter-kit/starter-kit.ts	2.56% <0.00%> (ø)
...ons/table-cell-background/table-cell-background.ts	10.00% <ø> (ø)
...ult-editor-extensions/default-editor-extensions.ts	100.00% <100.00%> (ø)

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[splincode]

@vladimirpotekhin hello, please review me

[well-done-bot]