Addon-docs: Update type/value rendering for 6.0 recommendations

[shilman]

Storybook 5.3 has a nice type rendering system based on react-docgen-typescript-loader. In SB 6.0 we've updated the recommended configuration, which brings a lot of improvements. However, the new setup exercises a new codepath that contains poor type/value rendering heuristics. These need to be updated before launch:

• Union
• Intersection
• Function
• etc.

[sunyatasattva]

@shilman Is there any news on this? The docs point out, for example, to the dealbreaker of imported types not working in react-docgen and link to the relevant PR, mentioning it is open. The PR has since been closed (reactjs/react-docgen#352) and instead another one has been merged (reactjs/react-docgen#464). Probably the docs should be updated accordingly as this is not anymore a deal breaker for react-docgen.

Otherwise, is there any plan to figure out things like union or signature with the current recommended configuration?

[shilman]

@sunyatasattva We now recommend react-docgen-typescript as the recommended docgen handler for Typescript. Any PRs to improve react-docgen handling would be highly appreciated.

[shilman]

We’re cleaning house! Storybook has changed a lot since this issue was created and we don’t know if it’s still valid. Please open a new issue referencing this one if:

• this is still a problem in SB 7.x
• you can provide a consistent reproduction in 7.x (at https://storybook.new/ or per repro docs).