docs(storybook): display overview documentation of subcomponents

[dobrinyonkov]

Closes: #7895

Problem: storybook doesn't display the overview documentation of the subcomponents.

Summary:

• Introduced custom TabbedArgsTable using the ui5-tabcontainer instead of the storybook's built in tabs.
• Conditionally render TabbedArgsTable based on sub-components, improving dosc display flexibility.
• Introduced the argTypeRegistry to dynamically fetch local argument types for components, enhancing the extensibility of the documentation system.
• Enhanced Storybook documentation generation in samples-prepare.js by dynamically exporting sub-components, component info, and registering arg types using argTypeRegistry.

Screenshot when the main component is selected:

Screenshot when any of the subcomponents are selected:

[nnaydenow]

appenddocs is removed from new custom-elements-manifest. we have to think about other solution