added trading example

ledger/trading/2024/01.beancount

@@ -1,7 +1,5 @@
-;2021-07-19 price AMNDEMWRLD                       99.326565 EUR
-;2021-07-19 price AMNDMSCIWRLD                    204.929967 EUR
-;2021-07-19 price BNPDISTECH                     1567.214485 EUR
-;2021-07-19 price JPMTECH                           6.101629 EUR
-;2021-07-19 price PLTR                                 5.994 EUR
-;2021-07-19 price IRNT                                0.2185 EUR
-2023-12-31 price USD  0.93 EUR
+;2024-01-02 * "Selling some MSFT"
+;  Assets:Invest:R4:MSFT           -3 MSFT {} @ 350 USD
+;  Assets:Liquid:R4:EUR            1040.05 EUR {1 USD}
+;  Expenses:R4:Comissions          9.95 EUR {1 USD}
+;  Income:Invest:R4:CapitalGains   -24.6 EUR {1 USD}

ledger/trading/index.beancount

@@ -1 +1,2 @@
-include "2024/*"
+include "2024/*"
+include "prices.beancount"

ledger/trading/prices.beancount

@@ -0,0 +1,8 @@
+2023-12-31 price USD  0.93 EUR
+2023-12-31 price AMNDMSCIWRLD 237.62 EUR
+2023-12-31 price VANEMMK 177.773 EUR
+2023-12-31 price FIGLTECH 41.06 EUR
+2023-12-31 price AMNDSUSINC 62.84 EUR
+2023-12-31 price BNPDISTECH 2195.55 USD
+2023-12-31 price PLTR 16.025 USD
+2023-12-31 price MSFT 341.8 USD