Feature make shorter syntaxes

[omitobi]

PHP 8.1+ enables First-class Callable class syntax which gives cleaner call with Piper.
This PR adds the following:

Getting ['H', 'E', 'L', 'L', 'O', ' ', 'W', 'O', 'R', 'L', 'D'] examples:

Use line - as in the line in Pipe"line"

piper("Hello World")
    ->ln(
        htmlentities(...),
        str_split(...),
        [array_map(...), strtoupper(...)],
    );

Think about ductape on a pipe. Ducter allows such neat calls to your functions

ducter(
    "Hello World",
    htmlentities(...),
    str_split(...),
    [array_map(...), strtoupper(...)],
)

Call functions like an array:

_p("Hello World")
    [htmlentities(...)]
    [str_split(...)]
    [[array_map(...), strtoupper(...)]]()

How about Closure() on Closure

_p("Hello World")
    (htmlentities(...))
    (strtoupper(...))
    (str_split(...))
    (array_map(...), strtoupper(...))()

Cleaner with underscore _

_p("Hello World")
    ->_(htmlentities(...))
    ->_(str_split(...))
    ->_(array_map(...), strtoupper(...));

Shortcut to pipe() is p()

_p("Hello World")
    ->p(htmlentities(...))
    ->p(str_split(...))
    ->p(array_map(...), strtoupper(...))()

PHP 7.4 fn() like

_p("Hello World")
    ->fn(htmlentities(...))
    ->fn(str_split(...))
    ->fn(array_map(...), strtoupper(...))
    ->fn()

Proxied call to globally available functions

_p("Hello World")
    ->htmlentities()
    ->str_split()
    ->array_map(strtoupper($part))()