refactor: moved client code into own module

src/client/client.v

@@ -0,0 +1,40 @@
+module client
+
+import net.http
+import response { Response }
+import json
+
+pub struct Client {
+pub:
+	address string
+	api_key string
+}
+
+pub fn new(address string, api_key string) Client {
+	return Client{
+		address: address
+		api_key: api_key
+	}
+}
+
+// send_request<T> is a convenience method for sending requests to the repos
+// API. It mostly does string manipulation to create a query string containing
+// the provided params.
+fn (c &Client) send_request<T>(method http.Method, url string, params map[string]string) ?Response<T> {
+	mut full_url := '${c.address}$url'
+
+	if params.len > 0 {
+		params_str := params.keys().map('$it=${params[it]}').join('&')
+
+		full_url = '$full_url?$params_str'
+	}
+
+	mut req := http.new_request(method, full_url, '') ?
+	req.add_custom_header('X-API-Key', c.api_key) ?
+
+	res := req.do() ?
+	data := json.decode(Response<T>, res.text) ?
+
+	return data
+}
+