office: Rename mail module to office module

Reflecting the somewhat expanding scope of the module, renamed it to
office. Still keeps the old files and setups but also got a new README
file.

office/.config/sh/alias.d/calcurse-vdir.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env sh
+#
+# Wraps around the calcurse invocation and syncs calendar data
+# to local vdir - given by default below.
+#
+# For now ONLY PROVIDES ONE-WAY Synchronization, see below.
+
+# The path in which *the calendars* reside (i.e. toplevel with access to all paths)
+CAL_PATH="$HOME/documents/calendars"
+
+calcurse() {
+    find "$CAL_PATH" -maxdepth 1 -type d -exec calcurse-vdir import {} \;
+}
+
+# Enable two-way sync. One issue is that calcurse would sync everything
+# into the top-level path (or the selected calendar path) since it makes
+# not the same differentiation as the vdir between calendars.
+# FIXME Not sure how to resolve currently.
+#
+# The below works as a simple two-way synchronization on exiting calcurse.
+# To function the invocation has to be turned from a function above to an
+# executable shell-script file instead.
+# trap 'calcurse_export' 0
+#
+# calcurse_export() {
+#     calcurse-vdir export "$CAL_PATH"
+# }