FEAT: added `system/float-options` new access path for setting floating point numbers options.

Usage:

    system/float-options <spec>
 where
    <spec>: block of flags (word! | set-word!) with values (logic! | word!).

Valid flags are:
    * pretty?: enables pretty printing of float numbers when very close to an integer value (default: true)
    * full?: enables math operations on float special values (default: false)

Examples:

    red>> 4.000000000000001e32
    == 4.0e32
    red>> system/float-options [pretty?: no]
    red>> 4.000000000000001e32
    == 4.000000000000001e32