chore: reorganize docs apps (#7228)

* reorganize docs apps

* add README

* fix directory

* add condition for old docs

www/apps/user-guide/app/inventory/inventory/page.mdx

@@ -0,0 +1,41 @@
+---
+sidebar_position: 1
+---
+
+import { EllipsisHorizontal } from "@medusajs/icons"
+
+export const metadata = {
+  title: `Manage Inventory`,
+}
+
+# {metadata.title}
+
+In this document, you’ll learn how to manage inventory in the Medusa Admin.
+
+## Check Inventory
+
+To check your store’s inventory, go to the Inventory page. Here, you’ll see the all available inventory of product variants.
+
+### Filter by Location
+
+To filter the shown results by location:
+
+1. Click on the "Add filter" button.
+2. Select Location from the dropdown.
+3. Select the location(s) to filter ther results by.
+
+---
+
+## Change Variant Inventory Quantity
+
+{/* TODO check info for correctness */}
+
+To change a product variant’s inventory quantity:
+
+1. Go to the Inventory page.
+2. Click the product variant to edit its inventory.
+3. Under the "Location levels" section, find the location to edit the quantity in.
+4. Click the <InlineIcon Icon={EllipsisHorizontal} alt="three-dots" /> icon at the right of the location.
+5. Choose "Adjust availability" from the dropdown.
+6. In the drawer that opens, edit the "In Stock" field with the new stock quantity of the variant.
+7. Once you're done, click the Save button.

www/apps/user-guide/app/inventory/page.mdx

@@ -0,0 +1,33 @@
+---
+sidebar_autogenerate_exclude: true
+---
+
+export const metadata = {
+  title: `Inventory`,
+}
+
+# {metadata.title}
+
+In this document, you’ll get an overview of the inventory domain of the Medusa Admin.
+
+## Overview
+
+When a product variant's "Manage Inventory" is enabled, inventory items are created for that variant to manage its quantity.
+
+An inventory item has different quantities for each [location](../settings/locations/page.mdx).
+
+<Note>
+
+The following aren't explained within this section of the user guide:
+
+- Item allocation and locations in orders: this is explained in the [Manage Orders guide](../orders/manage/page.mdx).
+- Managing general inventory of a product variant: this is explained in the [Manage Products guide](../products/manage/page.mdx).
+
+</Note>
+
+---
+
+## Learn More About Inventory
+
+- [Manage Inventory](./inventory/page.mdx)
+- [Manage Reservations](./reservations/page.mdx)

www/apps/user-guide/app/inventory/reservations/page.mdx

@@ -0,0 +1,79 @@
+---
+sidebar_position: 3
+---
+
+import { EllipsisHorizontal } from "@medusajs/icons"
+
+export const metadata = {
+  title: `Manage Reservations`,
+}
+
+# {metadata.title}
+
+In this document, you’ll learn how to manage reservations in your store.
+
+## View Reservations
+
+To view reservations, go to Inventory from the sidebar, the click the Reservations sub-item shown in the sidebar.
+
+In the reservations page, you can view all reservations.
+
+### Filter by Location
+
+To filter reservations by location:
+
+1. Click the "Add filter" button.
+2. Choose Location from the dropdown.
+3. Choose the locations(s) to filter the list by.
+
+---
+
+## Create a Reservation
+
+{/* TODO check info for correctness */}
+
+Reservations are created manually when an order is created. You can also manage them from the order’s page.
+
+To manually create a reservation item:
+
+1. Go to Inventory → Reservations.
+2. Click on the Create button.
+3. In the form that opens:
+    1. For the “Location” field, select the location the reservation is created in.
+    2. For the “Item to reserve” field, enter or choose the SKU of the item you want to create a reservation for.
+    3. Set the reserved quantity in the "Reserve amount" field.
+    4. You can optionally add a description in the Description field, or add additional data as key-value pairs under the Metadata section.
+4. Once you’re done, click the Save button.
+
+---
+
+## Edit Reservation
+
+{/* TODO check info for correctness */}
+
+To edit a reservation:
+
+1. Go to Inventory → Reservations
+2. Find the reservation you want to edit, and click the <InlineIcon Icon={EllipsisHorizontal} alt="three-dots" /> icon on its right.
+3. Choose Edit from the dropdown.
+4. In the drawer that opens, edit the reservation's details.
+5. Once you’re done, click the Save button.
+
+---
+
+## Delete Reservation
+
+<Note type="warning">
+
+Deleting a reservation is irreversible.
+
+</Note>
+
+{/* TODO check info for correctness */}
+
+To delete a reservation:
+
+1. Go to Inventory → Reservations
+2. Find the reservation you want to delete, and click the <InlineIcon Icon={EllipsisHorizontal} alt="three-dots" /> icon on its right.
+3. Choose Delete from the dropdown.
+4. Confirm deleting the reservation by clicking the Remove button in the pop-up.