more documentation in Plugin package

Flow.Launcher.Plugin/ActionContext.cs

@@ -2,18 +2,47 @@
 
 namespace Flow.Launcher.Plugin
 {
+    /// <summary>
+    /// Context provided as a parameter when invoking a
+    /// <see cref="Result.Action"/> or <see cref="Result.AsyncAction"/>
+    /// </summary>
     public class ActionContext
     {
+        /// <summary>
+        /// Contains the press state of certain special keys.
+        /// </summary>
         public SpecialKeyState SpecialKeyState { get; set; }
     }
 
+    /// <summary>
+    /// Contains the press state of certain special keys.
+    /// </summary>
     public class SpecialKeyState
     {
+        /// <summary>
+        /// True if the Ctrl key is pressed.
+        /// </summary>
         public bool CtrlPressed { get; set; }
+
+        /// <summary>
+        /// True if the Shift key is pressed.
+        /// </summary>
         public bool ShiftPressed { get; set; }
+
+        /// <summary>
+        /// True if the Alt key is pressed.
+        /// </summary>
         public bool AltPressed { get; set; }
+
+        /// <summary>
+        /// True if the Windows key is pressed.
+        /// </summary>
         public bool WinPressed { get; set; }
 
+        /// <summary>
+        /// Get this object represented as a <see cref="ModifierKeys"/> flag combination.
+        /// </summary>
+        /// <returns></returns>
         public ModifierKeys ToModifierKeys()
         {
             return (CtrlPressed ? ModifierKeys.Control : ModifierKeys.None) |

Flow.Launcher.Plugin/Interfaces/IContextMenu.cs

@@ -1,9 +1,18 @@
-using System.Collections.Generic;
+using System.Collections.Generic;
 
 namespace Flow.Launcher.Plugin
 {
+    /// <summary>
+    /// Adds support for presenting additional options for a given <see cref="Result"/> from a context menu.
+    /// </summary>
     public interface IContextMenu : IFeatures
     {
+        /// <summary>
+        /// Load context menu items for the given result.
+        /// </summary>
+        /// <param name="selectedResult">
+        /// The <see cref="Result"/> for which the user has activated the context menu.
+        /// </param>
         List<Result> LoadContextMenus(Result selectedResult);
     }
 }

Flow.Launcher.Plugin/Interfaces/IPluginI18n.cs

@@ -1,4 +1,4 @@
-using System.Globalization;
+using System.Globalization;
 
 namespace Flow.Launcher.Plugin
 {
@@ -7,8 +7,14 @@ namespace Flow.Launcher.Plugin
     /// </summary>
     public interface IPluginI18n : IFeatures
     {
+        /// <summary>
+        /// Get a localised version of the plugin's title
+        /// </summary>
         string GetTranslatedPluginTitle();
 
+        /// <summary>
+        /// Get a localised version of the plugin's description
+        /// </summary>
         string GetTranslatedPluginDescription();
 
         /// <summary>

Flow.Launcher.Plugin/Interfaces/ISavable.cs

@@ -1,12 +1,18 @@
-namespace Flow.Launcher.Plugin
+namespace Flow.Launcher.Plugin
 {
     /// <summary>
-    /// Save addtional plugin data. Inherit this interface if additional data e.g. cache needs to be saved,
+    /// Inherit this interface if additional data e.g. cache needs to be saved.
-    /// Otherwise if LoadSettingJsonStorage or SaveSettingJsonStorage has been callded,
-    /// plugin settings will be automatically saved (see Flow.Launcher/PublicAPIInstance.SavePluginSettings) by Flow
     /// </summary>
+    /// <remarks>
+    /// For storing plugin settings, prefer <see cref="IPublicAPI.LoadSettingJsonStorage{T}"/>
+    /// or <see cref="IPublicAPI.SaveSettingJsonStorage{T}"/>. 
+    /// Once called, your settings will be automatically saved by Flow.
+    /// </remarks>
     public interface ISavable : IFeatures
     {
+        /// <summary>
+        /// Save additional plugin data, such as cache.
+        /// </summary>
         void Save();
     }
 }

Flow.Launcher.Plugin/PluginInitContext.cs

@@ -1,5 +1,8 @@
 namespace Flow.Launcher.Plugin
 {
+    /// <summary>
+    /// Carries data passed to a plugin when it gets initialized.
+    /// </summary>
     public class PluginInitContext
     {
         public PluginInitContext()
@@ -12,6 +15,9 @@
             API = api;
         }
 
+        /// <summary>
+        /// The metadata of the plugin being initialized.
+        /// </summary>
         public PluginMetadata CurrentPluginMetadata { get; internal set; }
 
         /// <summary>