Implement bounded repository navigation with repo-lens

- Add map, find, and around commands with repository root discovery
- Stream literal ripgrep searches with match counts and result limits
- Add direct subprocess execution and explicit error returns
- Disable C++ exceptions and add navigation tests
- Support CMake installation and document builds and deployment
- Add a reusable agent skill and document skill discovery

test/test_main.cpp

@@ -1,6 +1,15 @@
+#include <iostream>
+#include <string_view>
 #include <gtest/gtest.h>
 
-TEST(testmain, example)
+auto main(int argc, char* argv[]) -> int
 {
-    EXPECT_EQ(42, 7*6);
-}
+	if (argc == 3 && std::string_view(argv[1]) == "--process-fixture")
+	{
+		std::cout << argv[2];
+		std::cerr << "fixture stderr";
+		return 7;
+	}
+	::testing::InitGoogleTest(&argc, argv);
+	return RUN_ALL_TESTS();
+}