[Add] README.md
[Add] .gitignore
[Add] IR_INLINE, ir_unused(), ir_result_e, ir_strresult()
[Add] ir_result_e @_code-complete-hint.h
[Add] ir_refcount_t
[Add] ir_iobject_t, ir_object_t
[Add] ir_weakptr_t
[Add] ir_ioutput_t
ir_stdoutput_t
[Add] ir_listnode_t