Allow users to import workflows from base templates

[midigofrank]

Description

This PR defines 2 templates which the user can choose from when creating a workflow, one for webhook trigger and another for cron trigger.
The default trigger workflow that was getting rendered initially when you create a workflow is what has been saved as base webhook template.

Closes #3110

Validation steps

1. Click to create a workflow.
2. Pick between the base-webhook and base-cron trigger
3. When you describe your workflow in the search input, that is what is used as the workflow name. If you don't put in the name, the workflow name will be picked as Copy of {template name}

Additional notes for the reviewer

I have removed the default workflow from the js land that was used to load the editor. This is because currently liveview provides the templates, including the default one.

AI Usage

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• Code generation (copilot but not intellisense)
• Learning or fact checking
• Strategy / design
• Optimisation / refactoring
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• Other
• I have not used AI

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Pre-submission checklist

• I have performed a self-review of my code.
• I have implemented and tested all related authorization policies. (e.g., :owner, :admin, :editor, :viewer)
• I have updated the changelog.
• I have ticked a box in "AI usage" in this PR

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.54%. Comparing base (46827eb) to head (b3a373c).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3136      +/-   ##
==========================================
+ Coverage   91.52%   91.54%   +0.02%     
==========================================
  Files         357      357              
  Lines       13399    13446      +47     
==========================================
+ Hits        12263    12309      +46     
- Misses       1136     1137       +1     

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[taylordowns2000]

looks great. i've restyled slightly and added drag & drop functionality plus some tests. thanks, frank!

[elias-ba]

@midigofrank @taylordowns2000 this is looking good to me, nice job 👏🏽