Feature/cmake install

This commit updates the cmake sources of the generated engine, so that the cmake install properly creates all necessary library files.

Example Usage:

cd engine
mkdir build && cd build
cmake -DINSTALL_PREFIX_PATH=/home/developer/libs ..
make install

Will generate:

This should enable any parenting CMakeLists to make use of find_library and target_link_libraries without additional target_include_directories.

Requires: CMake 3.23

engine/cmake/FindAntlr4Runtime.cmake

+################################################################################
+# Copyright (c) 2021-2022 Bayerische Motoren Werke Aktiengesellschaft (BMW AG)
+#
+# This program and the accompanying materials are made available under the
+# terms of the Eclipse Public License 2.0 which is available at
+# http://www.eclipse.org/legal/epl-2.0.
+#
+# SPDX-License-Identifier: EPL-2.0
+################################################################################
+#
+# Find Package Adapter for the Antlr4 Runtime
+#
+# Creates the follwoing imported targets (if available):
+# - antlr4_runtime::shared
+
+set(ANTLR4_RUNTIME_SHARED_NAMES
+  antlr4-runtime.lib
+  libantlr4-runtime.dll.a
+  libantlr4-runtime.so
+)
+
+find_library(ANTLR4_RUNTIME_SHARED_LIBRARY NAMES ${ANTLR4_RUNTIME_SHARED_NAMES}
+  PATHS
+    ${PREFIX_PATH}
+    /usr/local
+    /usr
+  PATH_SUFFIXES
+    lib
+    lib64
+)
+
+if(ANTLR4_RUNTIME_SHARED_LIBRARY)
+  message(STATUS "Found ANTLR4_RUNTIME (shared): ${ANTLR4_RUNTIME_SHARED_LIBRARY}")
+
+  get_filename_component(ANTLR4_RUNTIME_SHARED_LIBRARY_DIR "${ANTLR4_RUNTIME_SHARED_LIBRARY}" DIRECTORY)
+  add_library(antlr4_runtime::shared IMPORTED SHARED)
+  set_target_properties(antlr4_runtime::shared
+                        PROPERTIES
+                          IMPORTED_LOCATION ${ANTLR4_RUNTIME_SHARED_LIBRARY}
+                          IMPORTED_IMPLIB ${ANTLR4_RUNTIME_SHARED_LIBRARY}
+                          INTERFACE_LINK_DIRECTORIES ${ANTLR4_RUNTIME_SHARED_LIBRARY_DIR}
+                          )
+else()
+  message(STATUS "Didn't find ANTLR4_RUNTIME (shared)")
+endif()
+
+unset(ANTLR4_RUNTIME_CPP_BUILD_DIR)
+unset(ANTLR4_RUNTIME_CPP_BUILD_DIR_HDR)
+unset(ANTLR4_RUNTIME_SHARED_LIBRARY)
\ No newline at end of file