Emscripten support for BehaviorTree.CPP

[coder137]

Changes

• Removed compile errors that crop up when compiling with emsdk 3.1.47
• MiniCoro library errors

D:\CustomBuilds\emsdk\upstream\emscripten\cache\sysroot/include\emscripten/em_asm.h:152:1: error: templates must have C++ linkage
  152 | template<typename, typename = void> struct __em_asm_sig {};
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../3rdparty\minicoro/minicoro.h:310:1: note: extern "C" language linkage specification begins here
  310 | extern "C" {

Linked to issue: #679

Compiled on Windows with

• emsdk activate
• emcmake cmake -B build -G Ninja -DBTCPP_SHARED_LIBS=OFF -DBTCPP_BUILD_TOOLS=OFF -DBTCPP_UNIT_TESTS=OFF -DBTCPP_GROOT_INTERFACE=OFF -DBTCPP_SQLITE_LOGGING=OFF

[facontidavide]

I think this is very good, but there are conflicts to be solved. Can you rebase and fix this?