[docs] made structure for user docs combining manual and existing help

docs/docs.user.accounts.reports.md

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+---
+{
+	"_label": "Reports"
+}
+---
+Some of the major accounting reports are:
+
+### General Ledger
+
+General Ledger is based on the table GL Entry and can be filtered by Account and between a period. This will help you get a full update for all entries done in that period for that Account.
+
+### Trial Balance
+
+Trial Balance is the list of Account balances for all your Accounts (“Ledger” and “Group”) on a particular date. For each Account it will give you the:
+
+- Opening
+- Debits
+- Credits
+- Closing
+
+The sum of all closing balances in a Trial Balance must be zero. 
+
+### Accounts Payable and Accounts Receivable (AP / AR)
+
+These reports help you track the outstanding invoices to Customer and Suppliers. In this report, you will get your outstanding amounts period wise. i.e. between 0-30 days, 30-60 days and so on.
+
+You can also get your payables and receivables from direct reports on Sales Invoice and Purchase Invoice.
+
+### Sales and Purchase Register
+
+This is useful for making your tax statements invoice and Item wise. In this report, each tax Account is transposed in columns and for each Invoice and invoice Item, you will get how much individual tax has been paid based on the Taxes and Charges table.