add ledger-mode transaction and price snippet

- https://ledger-cli.org/
- https://github.com/ledger/ledger-mode

Author: guitmz

snippets/ledger-mode/transaction

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: ledger transaction
+# key: tr
+# --
+`(format-time-string "%Y-%m-%d")` ${1:Description}
+    ${2:Assets:Bank:DBK}  ${3:Amount} ${4:EUR}
+    ${5:Expenses:Unknown}