chore: reorganize docs apps (#7228)

* reorganize docs apps

* add README

* fix directory

* add condition for old docs

www/apps/user-guide/app/tips/bulk-editor/page.mdx

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+---
+sidebar_position: 1
+---
+
+import { getOsShortcut } from "docs-ui"
+
+export const metadata = {
+  title: `Bulk Editor`,
+}
+
+# {metadata.title}
+
+In this document, you'll learn about different tips and shortcuts to using the bulk editor.
+
+## Overview
+
+The bulk editor allows you to edit prices or values using a spreadsheet-interface. It simplifies the editing process when working with a large number of data, and provides you with an intuitive user experience.
+
+The bulk editor is used in different areas of the Medusa Admin.
+
+{/* TODO do we still need this next section? */}
+
+{/* ---
+
+## Toggle Columns View
+
+As the bulk editor may include a large number of columns, such as the different currencies supported in your store, you can toggle the columns' visibility to focus on a subset of columns.
+
+To do that:
+
+1. Click on the "View" button at the top left.
+2. Check or uncheck a column by clicking on it in the dropdown. */}
+
+---
+
+## Selecting Cells
+
+You can select multiple cells to apply an action on them. To do that:
+
+1. Click and hold the mouse on a cell
+2. Drag the mouse in the direction of the other cells you want to select.
+3. Once you're done selecting, release the hold.
+
+---
+
+## Editing Cells
+
+There are multiple ways you can edit cells in a bulk editor:
+
+1. To edit the value, click the cell, then enter your new value.
+3. To apply a value of a cell to other adjacent cells:
+    1. Click on a cell
+    2. Hold and Drag the blue dot at the corner of that cell to adjacent cells you want to apply the value to.
+    3. Once you're done, release the hold on the blue dot.
+
+---
+
+## Shortcuts
+
+You can use the following shortcuts while working with the bulk editor:
+
+- <Kbd>tab</Kbd>: Persist the current cell's value and move focus to the next cell.
+- <Kbd>backspace</Kbd>: Delete the value of the selected cell(s).
+- <Kbd>{getOsShortcut()}</Kbd> + <Kbd>Z</Kbd>: Undo a change you made in the currently selected cell(s).

www/apps/user-guide/app/tips/languages/page.mdx

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+---
+sidebar_position: 2
+---
+
+export const metadata = {
+  title: `Admin Languages`,
+}
+
+# {metadata.title}
+
+{/* TODO check whether the languages here are still valid. */}
+
+Medusa Admin comes with multi-language support. This document covers the complete list of available languages, both official and by the community.
+
+<Note>
+
+Can't find your language? Learn how you can contribute by translating the admin to other languages [here](!resources!/contribution-guidelines/admin-translations).
+
+</Note>
+
+## Official Languages
+
+- English
+- French
+- Portuguese
+
+## Community Translations
+
+<Note>
+
+Languages listed in this section are contributed by the Medusa community. So, their accuracy is not guaranteed. If you find problems with the translations, please [open an issue in our GitHub repository](https://github.com/medusajs/medusa/issues).
+
+</Note>
+
+- Bosanski
+- Deutsch
+- Español
+- Hindi
+- Hrvatski
+- Italiano
+- 한국어
+- 日本語
+- Polski
+- Русский
+- Slovenščina
+- Tamil
+- Tiếng Việt
+- Українська
+- العربية
+- Čeština
+- 简体中文
+- Български

www/apps/user-guide/app/tips/lists/page.mdx

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+---
+sidebar_position: 3
+---
+
+import { XMark } from "@medusajs/icons"
+
+export const metadata = {
+  title: `Lists`,
+}
+
+# {metadata.title}
+
+In this document, you’ll get an overview of lists in Medusa including filters, searching, and more!
+
+## Filter Items
+
+Use filters to retrieve items in a list matching specific criteria.
+
+{/* TODO check if the next section still applies */}
+
+{/* ### Quick Filters
+
+On a table with a list of items, you’ll find quick filters at the top of the list.
+
+You can click on one of these filters to quickly apply it to the list of items.
+
+![Quick filters for lists](https://res.cloudinary.com/dza7lstvk/image/upload/v1667998663/Medusa%20Docs/User%20Guide/eVwD0JP_ukor4r.png) */}
+
+To do that:
+
+1. Click on the "Add filter" button at the top of the list.
+2. From the dropdown, choose the criteria you want to filter.
+3. This shows a new set of values to filter the list by.
+4. After selecting the value, the list only includes the items matching your filters. You can also apply multiple filters.
+
+![Selected Filters](https://res.cloudinary.com/dza7lstvk/image/upload/v1710230676/User%20Guide/Screenshot_2024-03-12_at_10.04.20_AM_rz4xnn.png)
+
+The filters you create are saved and are applied everytime you view the same list.
+
+### Edit Saved Filters
+
+To edit a saved filter:
+
+1. Click on the filter.
+2. Choose the new value of the filter.
+
+### Delete Saved Filters
+
+To delete any saved filter you’ve created, click the <InlineIcon Icon={XMark} alt="X" /> icon next to the filter.
+
+### Clear Filters
+
+To clear all applied filters, click on the "Clear all" link at the end of the list of filters.
+
+---
+
+## Search Items
+
+To search for items in a list:
+
+1. Click the search bar at the top right of the list.
+2. Enter your search term. The list is updated in real-time.
+
+![Search items in a list](https://res.cloudinary.com/dza7lstvk/image/upload/v1710233000/User%20Guide/Screenshot_2024-03-12_at_10.43.09_AM_upv15y.png)
+
+---
+
+## Multiple Pages
+
+Lists in the Medusa Admin span across multiple pages if the number of items in that list are more than twenty. 
+
+Navigate between pages using the "Prev" and "Next" buttons at the bottom of the list.