Add glossary chapter

Signed-off-by: trivernis <trivernis@protonmail.com>

Glossary.toml

@@ -0,0 +1,8 @@
+
+[SHORT]
+long = "Long Form"
+description = "The description of the entry"
+
+[HTML]
+long = "Hypertext Markup Language"
+description = "The markup language of the web"

chapters/glossary.md

@@ -0,0 +1,51 @@
+# Glossary
+
+You can use glossary entries in Snekdown to provide
+a way of linking abbreviations to their longer form
+and auto expand the first occurrence of an abbreviation.
+
+
+Glossary entries can be defined in a separate TOML File.
+Per default the `Glossary.toml` file gets imported.
+
+```toml
+# Glossary.toml
+
+[SHORT]
+long = "Long Form"
+description = "The description of the entry"
+
+# Example
+[HTML]
+long = "Hypertext Markup Language"
+description = "The markup language of the web"
+```
+
+The defined entries can be used in the text by using the following syntax:
+
+
+Short entry:
+```
+~SHORT
+~HTML
+```
+
+~SHORT
+~HTML
+
+
+The first occurrence expands to the long form. When using it a second time it uses the shorter form:
+
+~SHORT
+~HTML
+
+
+You can force Snekdown to use the long form for an entry by writing
+
+```
+~~SHORT
+~~HTML
+```
+
+~~SHORT
+~~HTML

main.md

@@ -44,3 +44,7 @@
 - - -
 
 <[chapters/bibliography.md]
+
+- - -
+
+<[chapters/glossary.md]