[docs] started copy-pasting existing user manual

docs/docs.user.setup.first.md

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+---
+{
+	"_label": "Initial Setup"
+}
+---
+After a successful sign-up / installation of ERPNext, on your first sign-in, you will be shown a form to fill. 
+
+This form will create your first **Company** and **Fiscal Year** (accounting or financial year) record. You can create other Companies later.
+
+This will also set the default **Currency** and time zone for your account. Once your complete this, your first **Company** and **Chart of Accounts** will be created.
+
+Congrats! You are already on your way.
+
+The next step is to configure your Chart of Accounts or start adding users and setting their permissions.