Make tx an argument for decoderawtransaction (#2155)

* trivial: Make tx an argument for decoderawtransaction

* docs: Fix help command, add to docs

app/cli/src/main/scala/org/bitcoins/cli/ConsoleCli.scala

@@ -65,11 +65,11 @@ object ConsoleCli {
         .action((_, conf) => conf.copy(command = GetBestBlockHash))
         .text(s"Get the best block hash"),
       cmd("decoderawtransaction")
-        .hidden()
         .action((_, conf) =>
           conf.copy(command = DecodeRawTransaction(EmptyTransaction)))
         .text(s"Decode the given raw hex transaction")
-        .children(opt[Transaction]("tx")
+        .children(arg[Transaction]("tx")
+          .text("Transaction encoded in hex to decode")
           .required()
           .action((tx, conf) =>
             conf.copy(command = conf.command match {

docs/applications/server.md

@@ -137,6 +137,8 @@ For more information on how to use our built in `cli` to interact with the serve
  - `getfiltercount` - Get the number of filters
  - `getfilterheadercount` - Get the number of filter headers
  - `getbestblockhash` - Get the best block hash
+ - `decoderawtransaction` `tx` - `Decode the given raw hex transaction`
+     - `tx` - Transaction encoded in hex to decode
 
 #### Wallet
  - `rescan` `[options]` - Rescan for wallet UTXOs