App: fetch loans from the subgraph

frontend/app/.graphclient/persisted_operations.json

@@ -0,0 +1,3 @@
+{
+ "45745732d955f1e9e56be85453b7766bb2b5d776bad265e1e6734958fbc111c8": "query TrovesByAccount($account: Bytes!) {\n troves(where: {borrower: $account}) {\n id\n borrower\n debt\n deposit\n stake\n interestRate\n createdAt\n closedAt\n collateral {\n id\n token {\n symbol\n name\n }\n minCollRatio\n }\n }\n}\n\nquery TroveById($id: ID!) {\n trove(id: $id) {\n id\n borrower\n debt\n deposit\n stake\n interestRate\n createdAt\n closedAt\n collateral {\n id\n token {\n symbol\n name\n }\n minCollRatio\n }\n }\n}"
+}