doc: reference CLI utils from plugin interface classes.

src/Magnum/ShaderTools/AbstractConverter.h

@@ -316,6 +316,11 @@ different representations or performing optimizations and other operations on
 them. See @ref plugins for more information and `*ShaderConverter` classes in
 the @ref ShaderTools namespace for available scene converter plugins.
 
+@m_class{m-note m-success}
+
+@par
+    There's also a @ref magnum-shaderconverter "magnum-shaderconverter" tool, exposing functionality of all shader converter plugins on a command line.
+
 @section ShaderTools-AbstractConverter-usage Usage
 
 Shader converters are most commonly implemented as plugins. Depending on

src/Magnum/Text/AbstractFontConverter.h

@@ -125,6 +125,12 @@ namespace for available font converter plugins.
 You can use the @ref magnum-fontconverter "magnum-fontconverter" utility to do
 font conversion on command-line.
 
+@m_class{m-note m-success}
+
+@par
+    There's also a @ref magnum-fontconverter "magnum-fontconverter" tool,
+    exposing functionality of all font converter plugins on a command line.
+
 @section Text-AbstractFontConverter-subclassing Subclassing
 
 Plugin implements @ref doFeatures() and one or more of `exportTo*()` /

src/Magnum/Trade/AbstractImageConverter.h

@@ -145,6 +145,13 @@ Provides functionality for converting images between various internal formats
 or compressing them. See @ref plugins for more information and `*ImageConverter`
 classes in @ref Trade namespace for available image converter plugins.
 
+@m_class{m-note m-success}
+
+@par
+    There's also a @ref magnum-imageconverter "magnum-imageconverter" tool,
+    exposing functionality of all image converter plugins on a command line as
+    well as performing introspection of image files.
+
 @section Trade-AbstractImageConverter-data-dependency Data dependency
 
 The instances returned from various functions *by design* have no dependency on

src/Magnum/Trade/AbstractImporter.h

@@ -158,6 +158,13 @@ like this, completely with all error handling:
 See @ref plugins for more information about general plugin usage and
 `*Importer` classes in the @ref Trade namespace for available importer plugins.
 
+@m_class{m-note m-success}
+
+@par
+    There are also @ref magnum-imageconverter "magnum-imageconverter" and
+    @ref magnum-sceneconverter "magnum-sceneconverter" tools which you can use
+    to perform introspection of image and scene files.
+
 @subsection Trade-AbstractImporter-usage-callbacks Loading data from memory, using file callbacks
 
 Besides loading data directly from the filesystem using @ref openFile() like

src/Magnum/Trade/AbstractSceneConverter.h

@@ -135,6 +135,13 @@ various formats or performing optimizations and other operations on them. See
 @ref plugins for more information and `*SceneConverter` classes in the
 @ref Trade namespace for available scene converter plugins.
 
+@m_class{m-note m-success}
+
+@par
+    There's also a @ref magnum-sceneconverter "magnum-sceneconverter" tool,
+    exposing functionality of all scene converter plugins on a command line as
+    well as performing introspection of scene files.
+
 @section Trade-AbstractSceneConverter-data-dependency Data dependency
 
 The instances returned from various functions *by design* have no dependency on