Add ECM port

ports/ecm/CONTROL

@@ -0,0 +1,3 @@
+Source: ecm
+Version: 5.32.0
+Description: Extra CMake Modules (ECM), extra modules and scripts for CMake

ports/ecm/portfile.cmake

@@ -0,0 +1,29 @@
+#cmake-only scripts
+include(vcpkg_common_functions)
+set(SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/extra-cmake-modules-5.32.0)
+vcpkg_download_distfile(ARCHIVE
+    URLS "https://download.kde.org/stable/frameworks/5.32/extra-cmake-modules-5.32.0.zip"
+    FILENAME "extra-cmake-modules-5.32.0.zip"
+    SHA512 f966820e88fdbcdea7f20ff6b76ab8a6d2f7eaf78950bc690243b7201b9f646d92c83a998c19feab3bfe2ed528ec96ad1fa36e6ae320419d226cddd28cd433e5
+)
+vcpkg_extract_source_archive(${ARCHIVE})
+
+vcpkg_configure_cmake(
+    SOURCE_PATH ${SOURCE_PATH}
+    OPTIONS -DBUILD_HTML_DOCS=OFF
+            -DBUILD_MAN_DOCS=OFF
+            -DBUILD_QTHELP_DOCS=OFF
+            -DBUILD_TESTING=OFF
+)
+
+vcpkg_install_cmake()
+
+# Remove debug files
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug)
+
+# Handle copyright
+file(COPY ${SOURCE_PATH}/COPYING-CMAKE-SCRIPTS DESTINATION ${CURRENT_PACKAGES_DIR}/share/ecm)
+file(RENAME ${CURRENT_PACKAGES_DIR}/share/ecm/COPYING-CMAKE-SCRIPTS ${CURRENT_PACKAGES_DIR}/share/ecm/copyright)
+
+# Allow empty include directory
+set(VCPKG_POLICY_EMPTY_INCLUDE_FOLDER enabled)