Add docs for useFlowTransaction (#1345)

Co-authored-by: Chase Fleming <1666730+chasefleming@users.noreply.github.com>

Author: chasefleming

docs/tools/kit/index.md

@@ -20,6 +20,7 @@ sidebar_position: 1
 - [`useFlowQueryRaw`](#useflowqueryraw) – Execute Cadence scripts with optional arguments returning non-decoded data
 - [`useFlowMutate`](#useflowmutate) – Send transactions to the Flow blockchain
 - [`useFlowRevertibleRandom`](#useflowrevertiblerandom) – Generate pseudorandom values tied to block height
+- [`useFlowTransaction`](#useflowtransaction) – Fetch a Flow transaction by ID
 - [`useFlowTransactionStatus`](#useflowtransactionstatus) – Track transaction status updates
 
 ### Cross-VM (Flow EVM ↔ Cadence) Hooks
@@ -470,6 +471,45 @@ function RandomValues() {
 
 ---
 
+### `useFlowTransaction`
+
+```tsx
+import { useFlowTransaction } from "@onflow/kit"
+```
+
+Fetches a Flow transaction by ID and returns the decoded transaction object.
+
+#### Parameters:
+
+* `txId?: string` – The Flow transaction ID to fetch.
+* `query?: Omit<UseQueryOptions<Transaction | null, Error>, "queryKey" | "queryFn">` – Optional TanStack Query options like `staleTime`, `enabled`, etc.
+
+#### Returns: `UseQueryResult<Transaction | null, Error>`
+
+```tsx
+function TransactionDetails({ txId }: { txId: string }) {
+  const { data: transaction, isLoading, error, refetch } = useFlowTransaction({
+    txId,
+    query: { staleTime: 10000 },
+  })
+
+  if (isLoading) return <p>Loading transaction...</p>
+  if (error) return <p>Error fetching transaction: {error.message}</p>
+  if (!transaction) return <p>No transaction data.</p>
+
+  return (
+    <div>
+      <h2>Transaction ID: {transaction.id}</h2>
+      <p>Gas Limit: {transaction.gasLimit}</p>
+      <pre>Arguments: {JSON.stringify(transaction.arguments, null, 2)}</pre>
+      <button onClick={refetch}>Refetch</button>
+    </div>
+  )
+}
+```
+
+---
+
 ### `useFlowTransactionStatus`
 
 ```tsx