[docs] moved into folders

docs/user/setup/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.
+
+![First Screen](img/setup-first-screen.png)
+
+This form will create your first **Company** and **Fiscal Year** (accounting or financial year) record. You can create other Companies later.
+
+Some definitions:
+
+- Fiscal Year: is your financial year, the fiscal year usually starts on 1st Jan or 1st March for most regions. If you are not sure, consult an accountant.
+- Abbreviation: In a multi-company setup, the abbreviation is appended to each account, so keep it small (2-4) characters and all caps.
+
+This will also set the default **Currency** and time zone for your account. Once you complete this, your first **Company** and **Chart of Accounts** will be created.
+
+Congrats! You are already on your way.
+
+The next step is to follow implementation instructions.