feat: 切换后端至PaddleOCR-NCNN，切换工程为CMake

1.项目后端整体迁移至PaddleOCR-NCNN算法，已通过基本的兼容性测试
2.工程改为使用CMake组织，后续为了更好地兼容第三方库，不再提供QMake工程
3.重整权利声明文件，重整代码工程，确保最小化侵权风险

Log: 切换后端至PaddleOCR-NCNN，切换工程为CMake
Change-Id: I4d5d2c5d37505a4a24b389b1a4c5d12f17bfa38c

3rdparty/ncnn/docs/developer-guide/binaryop-broadcasting.md

@@ -0,0 +1,52 @@
+### broadcasting rule
+
+ncnn BinaryOp accepts blobs with different shape
+
+C = BinaryOp(A, B)
+
+shape notation convention is [w], [w,h], [w,h,c], [w,h,d,c]
+
+|type|A|B|C|
+|---|---|---|---|
+|1|[1]|scalar|[1]|
+|2|[1]|[2]|[2]|
+|3|[1]|[2,3]|[2,3]|
+|4|[1]|[2,3,4]|[2,3,4]|
+|5|[2]|scalar|[2]|
+|6|[2]|[1]|[2]|
+|7|[2]|[2]|[2]|
+|8|[3]|[2,3]|[2,3]|
+|9|[4]|[2,3,4]|[2,3,4]|
+|10|[2,3]|scalar|[2,3]|
+|11|[2,3]|[1]|[2,3]|
+|12|[2,3]|[3]|[2,3]|
+|13|[2,3]|[2,3]|[2,3]|
+|14|[3,4]|[2,3,4]|[2,3,4]|
+|15|[2,3,4]|scalar|[2,3,4]|
+|16|[2,3,4]|[1]|[2,3,4]|
+|17|[2,3,4]|[4]|[2,3,4]|
+|18|[2,3,4]|[3,4]|[2,3,4]|
+|19|[2,3,4]|[2,3,4]|[2,3,4]|
+|20|[1]|[2,3,4,5]|[2,3,4,5]|
+|21|[5]|[2,3,4,5]|[2,3,4,5]|
+|22|[4,5]|[2,3,4,5]|[2,3,4,5]|
+|23|[3,4,5]|[2,3,4,5]|[2,3,4,5]|
+|24|[2,3,4,5]|scalar|[2,3,4,5]|
+|25|[2,3,4,5]|[1]|[2,3,4,5]|
+|26|[2,3,4,5]|[5]|[2,3,4,5]|
+|27|[2,3,4,5]|[4,5]|[2,3,4,5]|
+|28|[2,3,4,5]|[3,4,5]|[2,3,4,5]|
+|29|[2,3,4,5]|[2,3,4,5]|[2,3,4,5]|
+
+some special broadcasting rule exists for model compatibility
+
+|special type|A|B|C|
+|---|---|---|---|
+|1|[2,3,4]|[1,1,4]|[2,3,4]|
+|2|[2,3,4]|[2,3,1]|[2,3,4]|
+|3|[1,1,4]|[2,3,4]|[2,3,4]|
+|4|[2,3,1]|[2,3,4]|[2,3,4]|
+|5|[2,3,4]|[1,3,4]|[2,3,4]|
+|6|[2,3,4]|[2,1,4]|[2,3,4]|
+|7|[1,3,4]|[2,3,4]|[2,3,4]|
+|8|[2,1,4]|[2,3,4]|[2,3,4]|