Complete agents note and set single-account budget to USD50

Agent-Logs-Url: https://github.com/donnyandjoern-debug/personal/sessions/ee4d4b11-c1a3-46f2-80d0-7d93df643d8d

Co-authored-by: donnyandjoern-debug <262665187+donnyandjoern-debug@users.noreply.github.com>

README.md

@@ -1,2 +1,12 @@
 # personal
-personal repository for Family Hoppe
+
+Personal repository for Family Hoppe.
+
+## Agents
+
+- [x] Account budget tracking agent is completed.
+
+## Budget scope
+
+- Budget for this account: **USD 50**
+- No other account is tracked.