xuning / sherpaonnx

* Use PROJECT_SOURCE_DIR rather than CMAKE_SOURCE_DIR to allow building as subdirectory

* Also use PROJECT_SOURCE_DIR instead of CMAKE_SOURCE_DIR in c/cxx api examples

* Only build examples by default when not building as subdirectory

* Do not suggest building binaries either

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Co-authored-by: user <user@mail.tld>

v should be V

…ng directory for CMake (#2033)

We also need to clear _last

See also https://github.com/Xiaobin-Rong/gtcrn

…ee for C.struct_SherpaOnnxOfflineRecognizerConfig ptr (#1976)

Co-authored-by: liyuzhi <liyuzhi@info.easeus.com.cn>

Co-authored-by: jian.chen03 <jian.chen03@transwarp.io>