[WIP] Dependency map for the types of Express

List of Express dependencies in general with their priority list.

**Priority 1**: Necessary to unlock the integration of the other types.
**Priority 2**: A direct dependency of Express and required for the types, but depends on those in Priority 1.
**Priority 3**: Not required to achieve the Express types but would be nice to have for the ecosystem. :)

- [ ] Express
- [ ] expressjs/body-parser (Priority 2)
- [x] raw-body
- [x] iconv-lite (We need to update it)
- [ ] qs (How do we want to achieve this? It’s not governed by Express, but since we don’t want to add the types as a dependency, let’s create a new issue to discuss it)
- [ ] types-is
- [ ] pillarjs/finalhandler (Priority 2)
- [ ] expressjs/serve-static (Priority 1)
- [ ] pillarjs/router (Priority 1)
- [ ] pillarjs/parseurl
- [x] pillarjs/path-to-regexp
- [ ] jshttp/vary (Priority 2)
- [ ] jshttp/content-disposition (Priority 2)
- [ ] jshttp/cookie v0 (Priority 2)
- [ ] jshttp/proxy-addr (Priority 2)
- [ ] jshttp/forwarded (Priority 2)

Note: I don't have time to finish this right now. If anyone feels like completing it, please comment on this issue and I will update it later. Or, if you have sufficient permissions to edit the issue, go ahead and do it