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

include/repo_tool_interface.hpp

@@ -2,6 +2,7 @@
 #define REPO_LENSE_TOOL_INTERFACE_HPP_INCLUDED
 
 #include <cstdint>
+#include <span>
 #include <string_view>
 
 #pragma once
@@ -10,20 +11,21 @@ namespace rl
 {
 
 using exit_code = std::int32_t;
+using arguments = std::span<const std::string_view>;
 
 class IRepoLensTool
 {
-public: 
-    IRepoLensTool() noexcept = default;
-    virtual ~IRepoLensTool() noexcept = default;
-    IRepoLensTool(const IRepoLensTool&) noexcept = delete;
-    IRepoLensTool(IRepoLensTool&&) noexcept = delete;
-    auto operator=(const IRepoLensTool&) noexcept -> IRepoLensTool& = delete;
-    auto operator=(IRepoLensTool&&) noexcept -> IRepoLensTool& = delete;
+public:
+	IRepoLensTool() noexcept = default;
+	virtual ~IRepoLensTool() noexcept = default;
+	IRepoLensTool(const IRepoLensTool&) noexcept = delete;
+	IRepoLensTool(IRepoLensTool&&) noexcept = delete;
+	auto operator=(const IRepoLensTool&) noexcept -> IRepoLensTool& = delete;
+	auto operator=(IRepoLensTool&&) noexcept -> IRepoLensTool& = delete;
 
-    [[nodiscard]] virtual auto execute(std::string_view arguments) noexcept -> exit_code = 0;
+	[[nodiscard]] virtual auto execute(arguments args) noexcept -> exit_code = 0;
 };
 
-}
+} // namespace rl
 
-#endif //REPO_LENSE_TOOL_INTERFACE_HPP_INCLUDED
+#endif // REPO_LENSE_TOOL_INTERFACE_HPP_INCLUDED