[gimp-help] Introduce entities.xml for storing some variables to use at build time.

[Jacob Boerema <jboerema src gnome org>]

commit 85d0d04da0f0b7f1a1365ef340618e792edca307
Author: Jacob Boerema <jgboerema gmail com>
Date:   Mon Sep 13 16:06:05 2021 -0400

    Introduce entities.xml for storing some variables to use at build time.
    
    (cherry picked from commit 254d013663d823b9c0e1e35a7e72508dd61caa4b)

 web/entities.xml | 8 ++++++++
 1 file changed, 8 insertions(+)
---
diff --git a/web/entities.xml b/web/entities.xml
new file mode 100644
index 000000000..c255a2365
--- /dev/null
+++ b/web/entities.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!ENTITY  project.impl.title            'GIMP Help Manual'      >
+
+<!ENTITY  gimp.release.base             '2.10'                  >
+<!ENTITY  gimp.release.version          '2.10.28'               >
+
+<!ENTITY  gimphelp.release.year         '2021'                  >