[AAE-4384] Add blank page component

[TomikaArome]

Please check if the PR fulfills these requirements

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

What kind of change does this PR introduce? (check one with "x")

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation
• Other... Please describe:

What is the current behaviour? (You can also link to an open issue here)

What is the new behaviour?

Blank page component previously available on certain other apps (such as ADW) has now been added to ADF

Does this PR introduce a breaking change? (check one with "x")

• Yes
• No

If this PR contains a breaking change, please describe the impact and migration path for existing applications: ...

Other information:

[codecov-io]

Codecov Report

Merging #6559 (19ca1b9) into develop (cf1bb70) will increase coverage by 0.15%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop    #6559      +/-   ##
===========================================
+ Coverage    76.26%   76.42%   +0.15%     
===========================================
  Files          869      861       -8     
  Lines        19625    19364     -261     
  Branches      3908     3839      -69     
===========================================
- Hits         14967    14798     -169     
+ Misses        3464     3386      -78     
+ Partials      1194     1180      -14     

Impacted Files	Coverage Δ
lib/core/blank-page/blank-page.component.ts	100.00% <100.00%> (ø)
lib/core/services/upload.service.ts	84.91% <0.00%> (-0.56%)	⬇️
...sions/src/lib/services/extension-loader.service.ts
.../components/dynamic-component/dynamic.component.ts
lib/extensions/src/lib/services/rule.service.ts
...b/extensions/src/lib/services/extension.service.ts
lib/extensions/src/test.ts
...ons/src/lib/services/component-register.service.ts
lib/extensions/src/lib/config/extension-utils.ts
...b/extensions/src/lib/evaluators/core.evaluators.ts
... and 2 more

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