horologion was the wrong book

The Horologion is the Book of Hours: the fixed portions of the services
themselves. This shows the day's commemorations, its fast and its season,
which is a Menologion. Naming it for a book whose contents it does not carry
was a real error and worth the churn to correct.

typikon already uses the word internally, for menologion.py and the data file
it loads. That is not a collision: typikon provides a menologion, this
displays one.

Renamed throughout, not just the repo: the two scripts, the QML component and
its three qmldir modules, MENOLOGION_COLORS, ~/.config/menologion/colors.json,
the eww widgets and scss variables, the waybar class. Verified standalone and
embedded in a foreign shell, and the smoke suite still passes.

Also drops the em dashes from the prose.

quickshell/shot.qml

@@ -22,7 +22,7 @@ ShellRoot {
         screen: Quickshell.screens[0]
 
         WlrLayershell.layer: WlrLayer.Overlay
-        WlrLayershell.namespace: "horologion-shot"
+        WlrLayershell.namespace: "menologion-shot"
         exclusionMode: ExclusionMode.Ignore
         color: "transparent"
 
@@ -49,7 +49,7 @@ ShellRoot {
                 anchors.topMargin: 34
                 width: Config.width
 
-                Horologion {
+                Menologion {
                     Component.onCompleted: {
                         const j = Quickshell.env("SHOT_JURISDICTION");
                         const d = Quickshell.env("SHOT_DATE");