feat: add Shields.io badges endpoint

- Introduced a new `ShieldsController` to handle requests for Shields.io badges related to bounties.
- Added a route in the router for fetching bounty statistics based on organization handle and status.
- Implemented JSON response format for badge data, enhancing integration with external services.

Author: zcesur

lib/algora_web/controllers/api/shields_controller.ex

@@ -0,0 +1,43 @@
+defmodule AlgoraWeb.API.ShieldsController do
+  use AlgoraWeb, :controller
+
+  alias Algora.Accounts
+  alias Algora.Bounties
+
+  def bounties(conn, %{"org_handle" => org_handle, "status" => status}) do
+    case Accounts.fetch_user_by(handle: org_handle) do
+      {:ok, org} ->
+        stats = Bounties.fetch_stats(org_id: org.id)
+
+        {label, message, label_color} =
+          case status do
+            "open" ->
+              {
+                "💎 Open Bounties",
+                Money.to_string!(stats.open_bounties_amount, no_fraction_if_integer: true),
+                "4f46e5"
+              }
+
+            "completed" ->
+              {
+                "💰 Rewarded Bounties",
+                Money.to_string!(stats.total_awarded_amount, no_fraction_if_integer: true),
+                "15803d"
+              }
+          end
+
+        json(conn, %{
+          schemaVersion: 1,
+          label: label,
+          message: message,
+          color: "grey",
+          labelColor: label_color
+        })
+
+      _ ->
+        conn
+        |> put_status(:not_found)
+        |> json(%{error: "Organization not found"})
+    end
+  end
+end

lib/algora_web/router.ex

@@ -171,6 +171,9 @@ defmodule AlgoraWeb.Router do
     # Legacy tRPC endpoints
     get "/trpc/bounty.list", BountyController, :index
     post "/trpc/bounty.list", BountyController, :index
+
+    # Shields.io badges
+    get "/shields/:org_handle/bounties", ShieldsController, :bounties
   end
 
   # Other scopes may use custom stacks.