README - Type Challenges

<h1>Query String Parser </h1><blockquote><p>by Pig Fang <a href="https://github.com/g-plane" target="_blank">@g-plane</a></p></blockquote><p><a href="https://tsch.js.org/151/play" target="_blank"></a> </p>

You're required to implement a type-level parser to parse URL query string into a object literal type.

Some detailed requirements:

Value of a key in query string can be ignored but still be parsed to true. For example, 'key' is without value, so the parser result is { key: true }.
Duplicated keys must be merged into one. If there are different values with the same key, values must be merged into a tuple type.
When a key has only one value, that value can't be wrapped into a tuple type.
If values with the same key appear more than once, it must be treated as once. For example, key=value&key=value must be treated as key=value only.