develop/ktcc: Post-SVN tidy

- Move source code from `trunk` into program root directory.
- Update build files and include paths.
- These changes also update the CI build files in `.gitea/workflows/`.
- Note: Line endings standardised from `CRLF` > `LF`, so best to view diffs with whitespace changes hidden.

programs/develop/ktcc/lib/libshell/shell_ping.c

@@ -0,0 +1,13 @@
+#include <shell_api.h>
+#include <sys/ksys.h>
+
+int shell_ping()
+{
+    __shell_init();
+    *__shell_shm = SHELL_PING;
+    _ksys_delay(10);
+    if(*__shell_shm==SHELL_OK){
+        return 1;
+    }
+    return 0;
+}