Add Arsenal feature doc (#5937)

* Add first draft of the arsenal feature page

* Fill out the loadout section, add doc for new shortcuts

* Add features part of the documentation

* Fix minor typos

* Fix typos, remove inline code highlighting for words

docs/wiki/feature/arsenal.md

@@ -0,0 +1,89 @@
+---
+layout: wiki
+title: ACE Arsenal
+description: Adds an interface that allow player to edit their loadouts.
+group: feature
+category: general
+parent: wiki
+mod: ace
+version:
+  major: 3
+  minor: 12
+  patch: 0
+---
+
+## 1. Overview
+
+### 1.1 Features
+
+ACE Arsenal has a pretty large number of improvements over BI Virtual Arsenal, here is a non exhaustive list:
+- The ability to select the magazine loaded into your primary / secondary / handgun without leaving ACE Arsenal.
+- Search bars for both the left and right panels.
+- New tabs to add weapon accessories to a container.
+- A "Clear container" button to remove all items from a container.
+- Unique items support.<sup>*</sup>
+- Loadouts can be shared with other players.
+- Mission makers can save "Default loadouts" that will be available in their own tab independently from player saved loadouts.
+- A setting to disable mod icons to increase performance even further.
+- An other setting to invert horizontal camera controls.
+- Settings to disable the "Default loadouts" and "Public loadouts" tabs.
+
+<sup>*</sup> Items not currently available in ACE Arsenal but in the unit's inventory, unique items will be omitted when loading loadouts and they can only be removed from containers.
+
+### 1.2 Loadouts
+
+<div class="panel callout">
+    <p>Loadouts from BI Virtual Arsenal will not show up in ACE Arsenal and vice versa.
+    Insignias, faces, and voices are NOT saved</p>
+</div>
+
+The loadouts screen is separated into 3 tabs:
+- "My loadouts" for loadouts saved into your profile.
+- "Default loadouts" for loadouts saved in the mission.
+- "Public loadouts" for loadouts made public by other players (does not persist after the owner disconnects).
+
+"Default loadouts" and "Public loadouts" tabs can be disabled by the mission maker.
+
+Loadout names are unique, you cannot have two loadouts with the same name, however you are able to rename loadouts.
+
+Saving loadouts from the default and public tabs will save them in your profile, they will show up in the "My loadouts" tab if you switch back to it.
+
+All loadouts can be loaded, however items not available or missing, will NOT be added. This limitation applies to all tabs as well as imported loadouts.
+
+The color coding for loadouts is as follows:
+- White: All items are available and will be loaded.
+- Grey: Some items in that loadout are not available in that box.
+- Red: Missing mods / class not defined, this takes precedence over grey if there is also unavailable items.
+
+## 2. Shortcuts
+
+<div class="panel callout">
+    <h5>Note:</h5>
+    <p><kbd>Ctrl</kbd> + <kbd>V</kbd> does NOT work in multiplayer due to a BI safety, however <kbd>Ctrl</kbd> + <kbd>C</kbd> does since it's using the ACE3 clipboard extension.</p>
+</div>
+
+### 2.1 Outside of search bars
+
+- <kbd>Ctrl</kbd> + <kbd>C</kbd>: Export current loadout to clipboard.
+- <kbd>Ctrl</kbd> + <kbd>V</kbd>: Import loadout from clipboard.
+- <kbd>Backspace</kbd>: Hide / show the UI (does not work on loadouts screen).
+- Arrow keys can be used to naviguate the left and right panels.
+- <kbd>Shift</kbd> + <kbd>LMB</kbd> on the `+` or `-` buttons on the right panel to add or remove 5 of the selected item.
+- <kbd>Ctrl</kbd> + <kbd>F</kbd> Selects the left search bar.
+
+<div class="panel callout">
+    <h5>Note:</h5>
+    <p><kbd>Shift</kbd> + arrow keys can be used to add or remove a large amount of items in a short amount of time from the right panel.</p>
+</div>
+
+### 2.2 Inside of search bars
+
+- Search bars support copy / cut and paste (same limitations as importing apply in multiplayer).
+- <kbd>Ctrl</kbd> + <kbd>A</kbd> is supported.
+- <kbd>Enter</kbd> validates the search.
+- <kbd>RMB</kbd> clears the text field.
+- Arrow keys can be used to move the caret.
+- <kbd>Ctrl</kbd> + <kbd>F</kbd> switches which search bar is selected.
+
+
+{% include dependencies_list.md component="arsenal" %}