libptouch: P700/P900 families, optional JSON config, ESC i z and print sequencing

- Add printer_family and profile flags; load overrides from printer_families.json
- Set ESC i z page byte from profile; pass prof into ptouch_fill_esc_iz
- End print with 0x1A only (drop FF prefix); extend Ruby FFI and CLI media info
- Add reference/ptp_raster_ref.adoc; install config under share/ptouch_label

Made-with: Cursor

CMakeLists.txt

@@ -27,6 +27,7 @@ set(LIBPTOUCH_SOURCES
 	src/lib/libptouch_usb.c
 	src/lib/libptouch_protocol.c
 	src/lib/libptouch_layout.c
+	src/lib/libptouch_family_config.c
 	src/lib/libptouch_media_info.c
 	src/lib/libptouch_trim.c
 	src/lib/libptouch_print.c
@@ -82,6 +83,8 @@ add_executable(ptouch-protocol-regression-test
 )
 target_include_directories(ptouch-protocol-regression-test PRIVATE
 	"${CMAKE_CURRENT_SOURCE_DIR}/src/lib"
+	"${CMAKE_CURRENT_SOURCE_DIR}/include"
+	"${CMAKE_CURRENT_BINARY_DIR}/include"
 )
 if(NOT MSVC)
 	target_compile_options(ptouch-protocol-regression-test PRIVATE -Wall -Wextra -Wpedantic)
@@ -96,3 +99,6 @@ install(FILES
 	"${CMAKE_CURRENT_SOURCE_DIR}/include/libptouch.h"
 	"${CMAKE_CURRENT_BINARY_DIR}/include/libptouch_version.h"
 	DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
+install(FILES
+	"${CMAKE_CURRENT_SOURCE_DIR}/config/printer_families.json"
+	DESTINATION "${CMAKE_INSTALL_DATADIR}/ptouch_label")