Update Containerfiles, start CLI tool.

+ Containerfiles: default to using g++.  Most of the dev machines aren't
  working with clang yet; until this is sorted out, they'll need to use
  g++.
+ Add script to determine if the git-tree is tagged.
+ Add basic CMake skeleton and start CLI tool.

src/packager.cc

@@ -0,0 +1,41 @@
+///
+/// \file packager.cc
+/// \author K. Isom <kyle@imap.cc>
+/// \date 2023-10-18
+/// \brief Packaging tools for shimmering-clarity.
+///
+
+#include <iostream>
+#include <string>
+
+#include <scsl/Commander.h>
+#include <scsl/Flag.h>
+
+
+static struct {
+	scsl::Flags	*flags;
+	std::string	 owner;
+	std::string	 distribution;
+	std::string	 component;
+	std::string	 password;
+	std::string	 username;
+	std::string	 version;
+} config;
+
+
+int
+main(int argc, char *argv[])
+{
+	config.flags = new scsl::Flags("sc3dev-packager", "package tooling for shimmering clarity");
+	config.flags->Register("--component", "main", "Debian package component");
+	config.flags->Register("--distribution", "ubuntu", "Debian package distribution");
+	config.flags->Register("--owner", "sc", "package repository owner");
+
+	auto status = config.flags->Parse(argc, argv);
+	if (status != scsl::Flags::ParseStatus::OK) {
+		std::cerr << "failed to parse flags: "
+			<< scsl::Flags::ParseStatusToString(status)
+			<< "\n";
+		exit(1);
+	}
+}