let 'not found' error hint to differently used, similar-named, method/mutating/free func

[bar-g]

ysh-0.29$ var list = []
ysh-0.29$ call list.append(1)

  call list.append(1)
            ^~~~~~
[ interactive ]:176: fatal: Method 'append' not found on builtin type List

Maybe error messages could give a syntax hint if a similarly named function or method exists.

Here, a mutating version (->append()) does exists.

[bar-g]

Another example: free function shSplit() is "not found" when used like split():
https://oilshell.zulipchat.com/#narrow/channel/264891-oil-help/topic/where.20is.20shSplit.28.29.20.3F/with/523634320