[golang] Bootstrap contracting and refactor the agent code

golang/pkg/api/contracts.go

@@ -0,0 +1,17 @@
+package api
+
+import (
+	"fmt"
+	"net/url"
+
+	"git.adyxax.org/adyxax/spacetraders/golang/pkg/model"
+)
+
+func (c *Client) MyContracts() ([]model.Contract, error) {
+	uriRef := url.URL{Path: "my/contracts"}
+	var contracts []model.Contract
+	if err := c.Send("GET", &uriRef, nil, &contracts); err != nil {
+		return nil, fmt.Errorf("failed to get contracts: %w", err)
+	}
+	return contracts, nil
+}