feat(medusa-js, medusa-react): PublishableApiKeys clients (#2582)

**What**
- add `PublishableApiKeys` endpoints to the `medusa-js` and `medusa-react` clients

--- 

RESOLVES CORE-791
DEPENDS ON https://github.com/medusajs/medusa/pull/2567

packages/medusa-react/mocks/data/fixtures.json

@@ -1151,6 +1151,14 @@
       "updated_at": "2021-03-17 12:09:59.156058+01",
       "metadata": null
     },
+    "publishable_api_key": {
+      "id": "pubkey_1234",
+      "created_by": "admin_user",
+      "created_at":  "2021-11-08 11:58:56.975971+01",
+      "updated_at":  "2021-11-08 11:58:56.975971+01",
+      "revoked_by": null,
+      "revoked_at": null
+    },
     "draft_order": {
       "id": "dorder_01FGKMYKMJ4E8HP3RGEW28E7CZ",
       "status": "open",

packages/medusa-react/mocks/handlers/admin.ts

@@ -962,6 +962,60 @@ export const adminHandlers = [
     }
   ),
 
+  rest.get("/admin/publishable-api-keys/", (req, res, ctx) => {
+    return res(
+      ctx.status(200),
+      ctx.json({
+        publishable_api_keys: fixtures.list("publishable_api_key"),
+      })
+    )
+  }),
+
+  rest.get("/admin/publishable-api-keys/:id", (req, res, ctx) => {
+    return res(
+      ctx.status(200),
+      ctx.json({
+        publishable_api_key: fixtures.get("publishable_api_key"),
+      })
+    )
+  }),
+
+  rest.post("/admin/publishable-api-keys/", (req, res, ctx) => {
+    return res(
+      ctx.status(200),
+      ctx.json({
+        publishable_api_key: {
+          ...fixtures.get("publishable_api_key"),
+          ...(req.body as any),
+        },
+      })
+    )
+  }),
+
+  rest.post("/admin/publishable-api-keys/:id/revoke", (req, res, ctx) => {
+    return res(
+      ctx.status(200),
+      ctx.json({
+        publishable_api_key: {
+          ...fixtures.get("publishable_api_key"),
+          revoked_at: "2022-11-10 11:17:46.666Z",
+          revoked_by: "admin_user",
+        },
+      })
+    )
+  }),
+
+  rest.delete("/admin/publishable-api-keys/:id", (req, res, ctx) => {
+    return res(
+      ctx.status(200),
+      ctx.json({
+        id: fixtures.get("publishable_api_key").id,
+        object: "publishable_api_key",
+        deleted: true,
+      })
+    )
+  }),
+
   rest.get("/admin/draft-orders/", (req, res, ctx) => {
     return res(
       ctx.status(200),