## Description
This PR's adds the custom widget.
#### PR fixes following issue(s)
Fixes#28607Fixes#28610Fixes#28615Fixes#28608Fixes#28612
> if no issue exists, please create an issue and ask the maintainers
about this first
>
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#### Media
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looks like it’s a GIF. instead, just link to the video
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#### Type of change
- New feature (non-breaking change which adds functionality)
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>
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## Testing
>
#### How Has This Been Tested?
> Please describe the tests that you ran to verify your changes. Also
list any relevant details for your test configuration.
> Delete anything that is not relevant
- [ ] Manual
- [ ] JUnit
- [x] Jest
- [x] Cypress
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#### Test Plan
> Add Testsmith test cases links that relate to this PR
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>
#### Issues raised during DP testing
> Link issues raised during DP testing for better visiblity and tracking
(copy link from comments dropped on this PR)
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## Checklist:
#### Dev activity
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my own code
- [x] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [x] PR is being merged under a feature flag
#### QA activity:
- [ ] [Speedbreak
features](https://github.com/appsmithorg/TestSmith/wiki/Guidelines-for-test-plans#speedbreakers-)
have been covered
- [ ] Test plan covers all impacted features and [areas of
interest](https://github.com/appsmithorg/TestSmith/wiki/Guidelines-for-test-plans#areas-of-interest-)
- [ ] Test plan has been peer reviewed by project stakeholders and other
QA members
- [ ] Manually tested functionality on DP
- [ ] We had an implementation alignment call with stakeholders post QA
Round 2
- [ ] Cypress test cases have been added and approved by SDET/manual QA
- [ ] Added `Test Plan Approved` label after Cypress tests were reviewed
- [ ] Added `Test Plan Approved` label after JUnit tests were reviewed
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **New Features**
- Introduced search functionality with a wildcard option for unmatched
widget searches.
- Added new routes for custom widget editing.
- Implemented additional editor modes for HTML and CSS.
- Created new code templates and help components for custom widget
builders.
- Enhanced property controls with new button controls for custom widget
editing.
- Updated theming interfaces and constants for better theming support.
- Added the CustomWidget component for embedding custom widgets in
iframes.
- Expanded widgets library to include the CustomWidget.
- **Enhancements**
- Improved `CodeEditor` with additional modes, props, and resize
behavior.
- Enhanced `PropertyPaneControlConfig` interface with dynamic
dependencies and additional properties.
- Refined custom widget scripts with communication channel and event
handling.
- **Bug Fixes**
- Fixed visibility logic for the `ExternalWidget` card.
- **Documentation**
- Added new messages and documentation links for custom widget features.
- **Tests**
- Implemented new Cypress tests for custom widget default components and
property pane interactions.
- Updated workspace commands in Cypress tests.
- **Refactor**
- Streamlined `PropertyControl` state management and editing functions.
- Refactored code editor hint helper logic.
- **Style**
- Added `borderLess` prop to style components without borders.
- **Chores**
- Updated constants and messages related to custom widget features.
- Adjusted webpack configuration to ignore specific module warnings.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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