## Description
Anvil Section Space distribution
In this pr, we are adding a feature to sections to redistribute a
sections space within its zones.
you can find details of it over
[here](https://www.notion.so/Sections-and-Zones-design-WIP-cbcb8b0ab2514aaf90d04aa3309ad56c)
As part of it we have three parts of changes
- UI components
- Middleware(Redux and Sagas)
- Space redistribution algorithm
UI/UX:
https://github.com/appsmithorg/appsmith/assets/35134347/092ba31f-d2e5-400e-80d7-45878d75ff98
Middleware changes:
- have added a new state in WidgetDragResizeState `anvil` and into it
have added `isDistributingSpace` to capture when space distribution is
active.
- added `anvilSpaceDistributionSagas` to capture all sagas wrt space
redistribution
Space redistribution algorithm:
- Have added algorithm for redistributing space, have noted down details
about it
[here](https://www.notion.so/appsmith/Space-distribution-and-responsiveness-questions-517d140e83864c2287765c99dcd7c8da?pvs=4#9b33c84bcea24cfca63d7caef036f896).
>
#### PR fixes following issue(s)
Fixes # (issue number)
> if no issue exists, please create an issue and ask the maintainers
about this first
>
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#### Media
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#### Type of change
> Please delete options that are not relevant.
- Bug fix (non-breaking change which fixes an issue)
- New feature (non-breaking change which adds functionality)
- Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- Chore (housekeeping or task changes that don't impact user perception)
- This change requires a documentation update
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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.
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- [ ] Manual
- [ ] JUnit
- [ ] Jest
- [ ] 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
- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] 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**
- Enhanced widget resizing capabilities with space distribution handles
in Anvil layout system.
- Introduced preview mode support for widget size configuration.
- **Enhancements**
- Improved Anvil layout system with dynamic space distribution during
resizing.
- Added flexibility to widget size configuration by considering preview
mode.
- **Bug Fixes**
- Corrected widget border styles to reflect space distribution and
resizing states.
- **Refactor**
- Streamlined space distribution logic in Anvil layout sagas and
selectors.
- Updated `AnvilFlexComponent` to conditionally assign `flexGrow`
property.
- **Documentation**
- Updated comments to clarify new space distribution behavior in Anvil
layout.
- **Style**
- Adjusted styles for space distribution handles in section layouts.
- **Chores**
- Added new action types for Anvil space distribution process.
- Enhanced Redux state structure for drag and resize operations.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Co-authored-by: Preet <preetsidhu.bits@gmail.com>
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