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

docs/docs.user.hr.expense_claim.md

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+---
+{
+	"_label": "Expense Claim"
+}
+---
+When Employee’s make expenses out their pocket on behalf of the company, like if they took a customer out for lunch, they can make a request for reimbursement via the Expense Claim form. 
+
+To make a new Expense Claim, go to:
+
+> HR > Expense Claim > New Expense Claim
+
+Set the Employee ID, date and the list of expenses that are to be claimed and “Submit” the record.
+
+### Approving Expenses
+
+The person making the claim must also set the id of the user who will “Approve” these expenses and set the “Assign To” to notify the user of the request Approve.
+
+If the Approver sees the “form”, she or he can update the “Approved Amounts” and click on “Approve”. To cancel the claim, they can click on the “Reject” button.
+
+Comments can be added in the Comments section explaining why the claim was approved or rejected.
+
+### Booking the Expense and Reimbursement
+
+The approved Expense Claim must be then be converted into a Journal Voucher and a payment must be made. Note: This amount should not be clubbed with Salary because the amount will then be taxable to the Employee.