doc: fix document about recent changes

- fix build commandline introduction in documentation.
- update build script template.
- only install document in any Release-like build type.
- now testbench will be installed in any Release-like build type, not only Release.

testbench/CMakeLists.txt

@@ -31,6 +31,6 @@ PRIVATE
 
 # Install testbench only on Release mode
 install(TARGETS YYCCTestbench
-    CONFIGURATIONS Release
+    CONFIGURATIONS Release RelWithDebInfo MinSizeRel
     RUNTIME DESTINATION ${YYCC_INSTALL_BIN_PATH}
 )