Make visual effect more user friendly.

[TheLimeGlass]

Suggestion

Seen many users get unknown effect errors by simply missing/changing a few words.

Skript/src/main/resources/lang/default.lang

Line 1285 in aa62e89

area_expression: [[with] [(1¦offset (of|by) %-number%, %-number%(,| and) %-number%)][(2¦[(and|at) ]speed %-number%)]]

[[with] [(1¦offset (of|by) %-number%, %-number%(,| and) %-number%)][(2¦[(and|at) ]speed %-number%)]]
this could change (of|by) to an optional [(of|by)], and add with to (and|at) to be (and|at|with)
[[with] [(1¦offset [(of|by)] %-number%, %-number%(,| and) %-number%)][(2¦[(and|at|with) ]speed %-number%)]]

The offset could also take in a vector
[[with] [(1¦offset [(of|by)] (%-number%, %-number%(,| and) %-number%|vector:%-vector%))][(2¦[(and|at|with) ]speed %-number%)]]

Also add of to EffVisualEffect's syntax to be %number% [of] %visualeffects% as some visual effect names are correct with the usage of the word of it's also solidified in Skript users minds to use the word of

Skript/src/main/java/ch/njol/skript/effects/EffVisualEffect.java

Line 51 in fda4fad

"(play|show) %number% %visualeffects% (on|%directions%) %locations% [(to %-players%|in (radius|range) of %number%)]");