jrnl: Add to writing module

Added base configuration of my digital journaling tool of choice jrnl to
the writing package.

writing/.config/jrnl/jrnl.yaml

@@ -0,0 +1,19 @@
+colors:
+  body: none
+  date: none
+  tags: none
+  title: none
+default_hour: 9
+default_minute: 0
+editor: nvim
+encrypt: false
+highlight: true
+indent_character: '|'
+journals:
+  default:
+    journal: ~/documents/records/jrnl.md
+linewrap: 79
+tagsymbols: '#@'
+template: false
+timeformat: '%F %r'
+version: v3.3