Add CW keying, function key messages and the documentation

The function keys send through cwdaemon or a WinKeyer, with N1MM's message
macros. Escape stops sending.

Settings are read with the reflection serializer rather than a generated one:
the generated one hands back null for every property the file leaves out
instead of the value the property is declared with, which crashed the program
the first time a new setting was added.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/Nonemm.App/Messages.cs

@@ -1,22 +1,58 @@
+using Nonemm.Core;
+
 namespace Nonemm.App;
 
 /// The function key messages. The text uses N1MM's macro names so a message
-/// file written for either program means the same thing.
+/// written for either program says the same thing.
 public static class Messages
 {
-    public static readonly IReadOnlyList<(string Key, string Label, string Text)> Defaults =
+    public static readonly IReadOnlyList<(string Key, string Label)> Keys =
     [
-        ("F1", "CQ", "CQ TEST {MYCALL} {MYCALL}"),
-        ("F2", "Exch", "{SENTRST} {EXCH}"),
-        ("F3", "TU", "TU {MYCALL}"),
-        ("F4", "MyCall", "{MYCALL}"),
-        ("F5", "HisCall", "{CALL}"),
-        ("F6", "Repeat", "{EXCH} {EXCH}"),
-        ("F7", "?", "?"),
-        ("F8", "Agn", "AGN"),
-        ("F9", "Nr?", "NR?"),
-        ("F10", "Call?", "CALL?"),
-        ("F11", "Spot", ""),
-        ("F12", "Wipe", ""),
+        ("F1", "CQ"), ("F2", "Exch"), ("F3", "TU"), ("F4", "MyCall"),
+        ("F5", "HisCall"), ("F6", "Repeat"), ("F7", "?"), ("F8", "Agn"),
+        ("F9", "Nr?"), ("F10", "Call?"), ("F11", "Spot"), ("F12", "Wipe"),
     ];
+
+    public static readonly IReadOnlyList<string> DefaultCw =
+    [
+        "CQ TEST {MYCALL} {MYCALL}",
+        "{SENTRST} {EXCH}",
+        "TU {MYCALL}",
+        "{MYCALL}",
+        "{CALL}",
+        "{EXCH} {EXCH}",
+        "?",
+        "AGN",
+        "NR?",
+        "CALL?",
+        "",
+        "",
+    ];
+
+    /// Phone messages name a recording to play; the text is what would be said.
+    public static readonly IReadOnlyList<string> DefaultPhone =
+    [
+        "CQ CONTEST {MYCALL}",
+        "{EXCH}",
+        "THANK YOU {MYCALL}",
+        "{MYCALL}",
+        "{CALL}",
+        "{EXCH} {EXCH}",
+        "PLEASE REPEAT",
+        "AGAIN",
+        "NUMBER PLEASE",
+        "YOUR CALL PLEASE",
+        "",
+        "",
+    ];
+
+    public static IReadOnlyList<string> For(
+        ModeCategory mode,
+        IReadOnlyList<string> cw,
+        IReadOnlyList<string> phone)
+    {
+        IReadOnlyList<string> stored = mode == ModeCategory.Phone ? phone : cw;
+        IReadOnlyList<string> fallback = mode == ModeCategory.Phone ? DefaultPhone : DefaultCw;
+        return stored.Count == Keys.Count ? stored : fallback;
+    }
 }