Add 'Run' + 'Explore' sections

This content is important for people and currently very hard to reach
and know about.

Author: wilzbach

index.dd

@@ -384,16 +384,16 @@ $(DIVC boxes,
             $(P Take the $(LINK2 https://tour.dlang.org,
                 Tour), explore
                 $(LINK2 $(ROOT_DIR)overview.html, major features) in D,
-                quick start with $(LINK2 $(ROOT_DIR)ctod.html, C) or
+                browse the $(LINK2 $(ROOT_DIR)comparison.html, quick overview),
+                start with $(LINK2 $(ROOT_DIR)ctod.html, C) or
                 $(LINK2 $(ROOT_DIR)cpptod.html, C++) background,
-                setup your $(LINK2 https://wiki.dlang.org/IDEs, IDE) or
-                $(LINK2 https://wiki.dlang.org/Editors, editor),
                 and ask questions in the
                 $(LINK2 https://forum.dlang.org/group/digitalmars.D.learn,
                     Learn forum).
             )
             $(P For a deeper dive into D
-                check out $(LINK2 https://wiki.dlang.org/Books, books) about D,
+                check out $(LINK2 https://wiki.dlang.org/Books, books) or
+                $(LINK2 https://wiki.dlang.org/Videos, videos)
                 such as Ali Çehreli's free book
                 $(LINK2 http://ddili.org/ders/d.en/index.html,
                 <cite>Programming in D</cite>).
@@ -413,9 +413,10 @@ $(DIVC boxes,
             )
         )
         $(TOUR book, Documentation,
-            $(P Refer to the documentation for the
-                $(LINK2 $(ROOT_DIR)spec/spec.html, language) and for
-                $(LINK2 $(ROOT_DIR)phobos/index.html, phobos), D's standard
+            $(P Refer to the
+                $(LINK2 $(ROOT_DIR)spec/spec.html, language specification) and
+                the documentation of
+                $(LINK2 $(ROOT_DIR)phobos/index.html, Phobos), D's standard
                 library. The
                 $(LINK2 $(ROOT_DIR)dmd.html, DMD manual) tells you how
                 to use the compiler. Read
@@ -441,6 +442,31 @@ $(DIVC boxes,
             )
         )
     )
+    $(DIVC row,
+        $(TOUR play, Run,
+            $(P Configure linting,
+                formatting or
+                completion for
+                your favorite $(LINK2 https://wiki.dlang.org/IDEs, IDE),
+                $(LINK2 https://wiki.dlang.org/Editors, editor) or
+                use $(LINK2 https://run.dlang.io, run.dlang.io) to play and experiment
+                with D code.
+            )
+        )
+        $(TOUR forward, Explore,
+            $(P
+                Learn about $(LINK2 https://qznc.github.io/d-tut, pragmatic D),
+                the $(LINK2 $(ROOT_DIR)dstyle.html, DStyle),
+                $(LINK2 https://p0nce.github.io/d-idioms, common D idioms) and
+                $(LINK2 https://github.com/PhilippeSigaud/D-templates-tutorial, templates),
+
+                See what's coming upcoming with $(LINK2 $(ROOT_DIR)changelog/pending.html, next version),
+                explore $(LINK2 https://github.com/dlang/DIPs, D Improvement Proposals),
+                and don't fear $(LINK2 https://dlang.org/blog/the-gc-series, D's garbage collection).
+
+            )
+        )
+    )
 )
 
 $(DIVC whyd, $(SECTION2 Fast code$(COMMA) fast.,