[AAE-4546] Update simpleapp

[bogdanapatrichi]

• Add new process - output-variables-mapping
• Add new form - form-with-single-input
• Add new DT - dt-input-output-vars

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: Update simpleapp

What is the current behaviour? (You can also link to an open issue here)
https://alfresco.atlassian.net/browse/AAE-4546

What is the new behaviour?

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 #6601 (a9a02ef) into develop (0804ff1) will increase coverage by 1.02%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #6601      +/-   ##
===========================================
+ Coverage    76.25%   77.27%   +1.02%     
===========================================
  Files          871      147     -724     
  Lines        19654     4150   -15504     
  Branches      3917      830    -3087     
===========================================
- Hits         14987     3207   -11780     
+ Misses        3473      666    -2807     
+ Partials      1194      277     -917     

Impacted Files	Coverage Δ
lib/core/form/services/ecm-model.service.ts
...nents/activities/diagram-receive-task.component.ts
...ts/icons/diagram-container-icon-event.component.ts
...services/form-definition-selector-cloud.service.ts
...d/src/lib/task/task-list/task-list-cloud.module.ts
.../components/icons/diagram-icon-signal.component.ts
...s/activities/diagram-box-publish-task.component.ts
lib/core/clipboard/clipboard.service.ts
.../src/lib/task/start-task/mock/task-details.mock.ts
...rc/lib/task/task-list/models/filter-cloud-model.ts
... and 714 more

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