Separate app-manager and app-framework from WAMR (#3129)

As planned, the app-manager and app-framework are to be migrated to
https://github.com/bytecodealliance/wamr-app-framework.

ps.
https://github.com/bytecodealliance/wasm-micro-runtime/issues/2329
https://github.com/bytecodealliance/wasm-micro-runtime/wiki/TSC-meeting-notes

samples/gui/wasm-apps/increase/CMakeLists.txt

@@ -1,20 +0,0 @@
-cmake_minimum_required(VERSION 2.8)
-
-project(wgl)
-
-set (WAMR_ROOT_DIR ${CMAKE_CURRENT_LIST_DIR}/../../../../)
-
-include_directories(
-    ${WAMR_ROOT_DIR}/wamr-sdk/out/gui/app-sdk/wamr-app-framework/include
-    ${WAMR_ROOT_DIR}/core/deps
-)
-
-set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS},-L${WAMR_ROOT_DIR}/wamr-sdk/out/gui/app-sdk/wamr-app-framework/lib")
-set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS},--export=on_init,--export=on_timer_callback,--export=on_widget_event,--export=__heap_base,--export=__data_end")
-set (CMAKE_C_FLAGS          "${CMAKE_C_FLAGS} -O3 -Wno-unused-command-line-argument")
-
-add_executable(ui_increase.wasm
-    ${CMAKE_CURRENT_LIST_DIR}/src/main.c
-)
-
-target_link_libraries(ui_increase.wasm  app_framework)

samples/gui/wasm-apps/increase/Makefile

@@ -1,34 +0,0 @@
-# Copyright (C) 2019 Intel Corporation.  All rights reserved.
-# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
-CC = /opt/wasi-sdk/bin/clang
-APP_DIR = ${shell pwd}
-IWASM_DIR = ../../../../core/iwasm
-APP_FRAMEWORK_DIR = ../../../../core/app-framework
-DEPS_DIR = ../../../../core/deps
-
-CFLAGS += -O3 \
-	  -Wno-int-conversion \
-	  -I$(APP_DIR)/src \
-	  -I$(APP_FRAMEWORK_DIR)/base/app \
-	  -I$(APP_FRAMEWORK_DIR)/app-native-shared \
-	  -I$(APP_FRAMEWORK_DIR)/sensor/app \
-	  -I$(APP_FRAMEWORK_DIR)/wgl/app \
-	  -I$(APP_FRAMEWORK_DIR)/connection/app \
-	  -I${DEPS_DIR}
-
-SRCS += $(APP_DIR)/src/main.c
-
-# For app size consideration, not all but necessary app libs are included
-SRCS += $(APP_FRAMEWORK_DIR)/base/app/timer.c
-SRCS += $(APP_FRAMEWORK_DIR)/wgl/app/src/*.c
-
-all:
-	@$(CC) $(CFLAGS) $(SRCS) \
-    --target=wasm32-wasi -O3 -z stack-size=2048 -Wl,--initial-memory=65536 \
-    -nostdlib -Wl,--allow-undefined \
-    -Wl,--strip-all,--no-entry \
-    -Wl,--export=on_init -Wl,--export=on_timer_callback \
-    -Wl,--export=on_widget_event \
-    -Wl,--export=__heap_base,--export=__data_end \
-    -o ui_app.wasm