[amtk] docs: write a mini roadmap

[Sébastien Wilmet <swilmet src gnome org>]

commit 54e10929f2d14e3e0d5751404de4da0e7287dcfa
Author: Sébastien Wilmet <swilmet informatique-libre be>
Date:   Wed May 11 23:15:32 2022 +0200

    docs: write a mini roadmap

 docs/dev-notes  | 7 ++-----
 docs/roadmap.md | 7 +++++++
 2 files changed, 9 insertions(+), 5 deletions(-)
---
diff --git a/docs/dev-notes b/docs/dev-notes
index fe1fc4e..8a09e04 100644
--- a/docs/dev-notes
+++ b/docs/dev-notes
@@ -1,8 +1,5 @@
-Amtk notes
-==========
-
-Possible things to do
----------------------
+Amtk notes - possible things to do or to investigate
+====================================================
 
 - When calling amtk_menu_item_set_icon_name(), do not have a large margin on
   the left. GtkUIManager was able to put the icon without the large margin (in
diff --git a/docs/roadmap.md b/docs/roadmap.md
new file mode 100644
index 0000000..b9f53ab
--- /dev/null
+++ b/docs/roadmap.md
@@ -0,0 +1,7 @@
+Amtk roadmap
+============
+
+- See the dev-notes file for possible tasks.
+
+- Port to GTK 4, see if creating a traditional UI with GTK 4 is still (easily)
+  possible. If some features are missing wrt GTK 3, fill the gap.