refactor: rename C++ namespace from questdb::ilp to questdb::ingress for consistency with other clients (#43)

Author: amunra

.gitignore

@@ -6,5 +6,5 @@ cmake-build-release
 .vscode
 .idea
 questdb-rs/Cargo.lock
-include/questdb/ilp/line_sender.gen.h
-cython/questdb/ilp/line_sender.pxd
+include/questdb/ingress/line_sender.gen.h
+cython/questdb/ingress/line_sender.pxd

README.md

@@ -44,11 +44,11 @@ To get started, read the language-specific guides.
 
 **C**
 * [Getting started with C](doc/C.md)
-* [`.h` header file](include/questdb/ilp/line_sender.h)
+* [`.h` header file](include/questdb/ingress/line_sender.h)
 
 **C++**
 * [Getting started with C++](doc/CPP.md)
-* [`.hpp` header file](include/questdb/ilp/line_sender.hpp)
+* [`.hpp` header file](include/questdb/ingress/line_sender.hpp)
 
 **Rust**
 * [Getting started with Rust](questdb-rs/README.md)

cpp_test/mock_server.cpp

@@ -89,7 +89,7 @@ static void release_winsock()
 }
 #endif
 
-namespace questdb::ilp::test
+namespace questdb::ingress::test
 {
 
 mock_server::mock_server()

cpp_test/mock_server.hpp

@@ -39,7 +39,7 @@ typedef int socketfd_t;
 typedef SOCKET socketfd_t;
 #endif
 
-namespace questdb::ilp::test
+namespace questdb::ingress::test
 {
 
 /**