Refactored all single record actions

[bosiraphael]

Context

Refactored all single record actions so they can be defined by a config file.
This refactoring is made with the idea that later the actions will be stored in the database, so we needed a way to serialize them.
For each object we can define a config file, if an object has no config file, it falls back to the default config.
I introduced action hooks, which return:

• shouldBeRegistered: boolean Whether the action should be registered.
• onClick: () => void The code that will be executed when we click on an action
• ConfirmationModal?: React.ReactNode (optional) The confirmation modal which will be displayed on click

This PR also closes #8973

Next steps

• Refactor multiple records actions
• Refactor no selection actions
• Add tests

[greptile-apps]

PR Summary

This PR implements a major refactoring of single record actions to use a configuration-based approach, preparing for future database storage of action definitions.

• Added DefaultSingleRecordActionsConfigV1.ts and DefaultSingleRecordActionsConfigV2.ts defining standard actions (favorites, delete) with consistent properties like type, scope, and hooks
• Added WorkflowSingleRecordActionsConfig.ts with 8 workflow-specific actions (activate, deactivate, test, etc.) following the same configuration pattern
• Introduced new action hook pattern returning shouldBeRegistered, onClick, and optional ConfirmationModal through actionHookResult.ts
• Removed imperative action registration in favor of declarative configs, deleting files like SingleRecordActionMenuEntrySetter.tsx and useManageFavoritesSingleRecordAction.ts
• Added feature flag IS_PAGE_HEADER_V2_ENABLED in RecordShowPage.tsx to control new action menu vs legacy workflow headers

_{32 file(s) reviewed, 28 comment(s)
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[thomtrp]

Please add tests for your hooks. Otherwise someone else will be stuck with coverage soon :)

[charlesBochet]

I haven't tested it functionnally but the code looks great, love the approach
Please put back some tests!