feat(FR-404): show or hide model folder related info

[agatha197]

resolves (FR-404)
related PR: lablup/backend.ai#3503

Adds a configuration flag enableModelFolders to control the visibility of model folder features in the UI. When disabled, this removes the "Model" option from folder creation and hides the Models tab in the folder list view.

Checklist:

• Documentation
• Minium required manager version: Backend.AI 23.03
• Specific setting for review: Set enableModelFolders = false in config.toml to verify feature is hidden
• Minimum requirements to check during review:
  • Model radio option should be hidden in folder creation dialog when disabled
  • Models tab should not appear in folder list when disabled
  • Features should be visible when enabled (default true)

[agatha197]

• feat(FR-404): show or hide model folder related info #3049 👈 (View in Graphite)
• main

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Coverage report for ./react

St.❔	Category	Percentage	Covered / Total
🔴	Statements	4.93%	398/8074
🔴	Branches	4.25% (-0% 🔻)	239/5621
🔴	Functions	2.95%	78/2640
🔴	Lines	4.85%	383/7899

Test suite run success

124 tests passing in 14 suites.

Report generated by 🧪jest coverage report action from 8894192