Add new diagnostic tabs

[ykeremy]

:rocket:	This description was created by Ellipsis for commit 39ae778ac3553e4636b9d369dbec27e66f59bae2

Summary:

Adds new diagnostic tabs for 'HTML Element Tree' and 'LLM Request (Raw)' in StepArtifacts component, handling new artifact types and updating UI accordingly.

Key points:

• File Modified: skyvern-frontend/src/routes/tasks/detail/StepArtifacts.tsx
• Component Modified: StepArtifacts
• New Tabs Added: 'HTML Element Tree' and 'LLM Request (Raw)'
• New Artifact Types Handled: ArtifactType.VisibleElementsTree and ArtifactType.LLMRequest
• UI Changes: Updated TabsList to include new tabs and TabsContent to display corresponding content if artifacts are present.

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