Add the core, contest, storage and format layers

Frequencies, bands, modes, callsigns, grid squares and the country file live in
Nonemm.Core. Nonemm.Contests holds the scoring engine and CQ WW and CQ WPX.
Nonemm.Storage writes N1MM's DXLOG schema, and Nonemm.Formats writes Cabrillo
3.0 and reads and writes ADIF.

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

build.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+# Build or test the solution with the SDK this machine keeps in ~/.dotnet.
+export DOTNET_ROOT="$HOME/.dotnet"
+export PATH="$HOME/.dotnet:$HOME/.dotnet/tools:$PATH"
+export DOTNET_NOLOGO=1 DOTNET_CLI_TELEMETRY_OPTOUT=1
+cd "$(dirname "$0")" || exit 1
+exec dotnet "$@"