docs: Add SDK page (#167)

docs/sdk/index.md

@@ -1 +1,30 @@
 # Interacting with Fireactions via SDK
+
+Fireactions provides a simple SDK for interacting with the Fireactions API. You can use the SDK to get, list, pause and resume pools.
+
+Example usage:
+
+```golang
+package main
+
+import (
+  "fmt"
+  "log"
+  "os"
+
+  "github.com/hostinger/fireactions"
+)
+
+func main() {
+  client = fireactions.NewClient(fireactions.WithEndpoint(os.Getenv("FIREACTIONS_ENDPOINT")), fireactions.WithUsername(os.Getenv("FIREACTIONS_USERNAME")), fireactions.WithPassword(os.Getenv("FIREACTIONS_PASSWORD")))
+
+  pool, err := client.GetPool("pool-id")
+  if err != nil {
+    log.Fatalf("Failed to get pool: %v", err)
+  }
+
+  fmt.Printf("Pool: %+v\n", pool)
+}
+```
+
+For more up-to-date information, see the [GoDoc documentation](https://pkg.go.dev/github.com/hostinger/fireactions).