flux: Define all resource classes that extend KubeObject, refactor to use useGet and useList methods

[sniok]

I've noticed that in the development mode flux page becomes unresponsive and hangs.

This PR refactors how resource classes are created and used. Instead of recreating classes on each rerender it now defines all classes in Resources.tsx

And in all pages it now uses Class.useList and Class.useGet functions instead of old ones

Testing

Click through all flux-registered pages and verify that lists are still displayed as usual

[Copilot]

Pull Request Overview

This PR refactors the Flux plugin to define all resource classes as KubeObject extensions in a centralized Resources.tsx file and standardizes the use of useGet and useList methods throughout the codebase.

• Replaces function-based resource class creation with KubeObject class extensions for better type safety and consistency
• Consolidates all resource definitions into a single Resources.tsx file for improved maintainability
• Simplifies component code by using the standardized useGet and useList methods instead of custom state management

Reviewed Changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
flux/src/common/Resources.tsx	Defines all Flux resource classes extending KubeObject with proper static properties
flux/src/sources/SourceSingle.tsx	Refactors to use getSourceClassByPluralName helper function
flux/src/sources/SourceList.tsx	Removes function-based class definitions and uses imported resource classes
flux/src/sources/Source.tsx	Simplifies useSource hook to use useGet method and removes GetSource component
flux/src/overview/index.tsx	Refactors to use direct useList calls with resource classes and helper functions
flux/src/notifications/NotificationSingle.tsx	Updates to use imported resource classes and useGet method
flux/src/notifications/NotificationList.tsx	Removes function-based definitions and uses imported classes with useList
flux/src/mapView.tsx	Updates resource class imports and adds weight properties to nodes
flux/src/kustomizations/KustomizationSingle.tsx	Simplifies to use Kustomization class and useGet method
flux/src/kustomizations/KustomizationList.tsx	Removes function-based definition and uses imported Kustomization class
flux/src/image-automation/ImageAutomationSingle.tsx	Updates to use imported resource classes
flux/src/image-automation/ImageAutomationList.tsx	Removes function-based definitions and uses imported classes
flux/src/helpers/index.tsx	Adds gridTemplate properties to table columns
flux/src/helm-releases/HelmReleaseSingle.tsx	Simplifies to use HelmRelease class and useGet method
flux/src/helm-releases/HelmReleaseList.tsx	Removes function-based definition and uses imported HelmRelease class
flux/src/actions/index.tsx	Updates SyncWithSourceAction to use useSource hook

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[illume]

Can you please provide a PR description/steps to test/issue link?