fix: space edit readme button visible for space members without permissions

[AlexAndBear]

Description

Related Issue

• Fixes Space description edit icon is showing for viewers #1179

How Has This Been Tested?

• test environment:
• test case 1:
• test case 2:
• ...

Types of changes

• Bugfix
• Enhancement (a change that doesn't break existing code or deployments)
• Breaking change (a modification that affects current functionality)
• Technical debt (addressing code that needs refactoring or improvements)
• Tests (adding or improving tests)
• Documentation (updates or additions to documentation)
• Maintenance (like dependency updates or tooling adjustments)

[Copilot]

Pull Request Overview

This PR fixes an issue where the space edit readme button was visible to space members who lack the necessary permissions to edit the readme. The fix implements proper permission checking to conditionally show the edit button.

• Adds visibility check for the edit readme button based on user permissions
• Imports and uses the useSpaceActionsEditReadmeContent composable for permission validation
• Wraps the edit button container with a conditional directive

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[Copilot]

Accessing array index [0] without checking if the array has elements could cause a runtime error. Consider adding a safety check or using optional chaining.

Suggested change

	const isEditReadmeVisible = computed(() =>
	unref(editReadmeContentActions)[0].isVisible({ resources: [space] })
	)
	const isEditReadmeVisible = computed(() => {
	const actions = unref(editReadmeContentActions);
	return actions.length > 0 ? actions[0].isVisible({ resources: [space] }) : false;
	})