Misleading doc string generation in typescript components

Hi, I am migrating dash-mantine-components to typescript. However, I have been facing some issues with the doc strings generation. The doc strings are not very accurate, in fact, for some prop types, doc string generation just fails.

Example 1
Have a look at how the doc string is generated for the radius prop.

The radius property will accept both strings and numbers but the doc string is misleading.

Example 2
For somewhat complex prop types such as value here, the prop generation just fails with the below error.

Error:

> dash_mantine_components@0.11.0a0 build:backends
> dash-generate-components ./src/ts/components dash_mantine_components -p package-info.json --r-prefix '' --jl-prefix '' --ignore \.test\.


ERROR: "__@iterator@2374" matches reserved word pattern: /^_.*$/

ERROR: "__@unscopables@2376" matches reserved word pattern: /^_.*$/
extract-meta failed

Error generating metadata in dash_mantine_components (status=1)
error: Recipe `build` failed on line 5 with exit code 1

Thanks
Snehil

Start with the dash-generate-components command and its extract-meta step described in the issue. Reproduce the radius documentation mismatch and the value-generation failure using the linked dash-mantine-components examples. Done means complex TypeScript prop types generate successfully and the resulting doc strings accurately describe accepted values.