request struct parsing

[toasted226]

Implemented parsing of request into struct using an enum for the method, string for uri and a hashmap for headers. I've also moved the http request struct logic into a different module. This PR does not include parsing of the request body.

The following update was meant to be another PR but I pushed without realising I hadn't changed branch lol:

• Added request body parsing, this currently just parses into a String type, regardless of headers
• Added a simple router structure to allow adding endpoints easily, this still needs to change a bit to allow for ring-compatible middleware
• Added a simple response structure that's returned from the router, containing a status, headers and a response.
• The response can be configured to return headers and a proper status code from the list of available status codes.

[merveillevaneck]

this is fire

[toasted226]

there's another PR inside this one lol