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/shell.qml

@@ -11,7 +11,7 @@ import "services"
 // A runnable widget on its own — `quickshell -p quickshell/shell.qml`.
 //
 // It sits on the background layer, so it behaves like part of the wallpaper:
-// always under your windows, never stealing a click. Drop the Horologion
+// always under your windows, never stealing a click. Drop the Menologion
 // component into an existing shell instead if you already have one.
 ShellRoot {
     Variants {
@@ -22,7 +22,7 @@ ShellRoot {
             screen: modelData
 
             WlrLayershell.layer: WlrLayer.Background
-            WlrLayershell.namespace: "horologion"
+            WlrLayershell.namespace: "menologion"
             exclusionMode: ExclusionMode.Ignore
             color: "transparent"
 
@@ -36,7 +36,7 @@ ShellRoot {
                 id: content
                 anchors.fill: parent
 
-                Horologion {
+                Menologion {
                     // Leave empty to follow `typikon --set-default`, or name a
                     // jurisdiction here: "rocor", "antiochian", "oca", ...
                     Component.onCompleted: Typikon.jurisdiction = ""