add idea custom keywords

docs/scarpet/resources/editors/idea/1.txt

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+abs
+acos
+acosh
+acot
+all
+asin
+asinh
+atan
+atan2
+atanh
+bool
+break
+call
+ceil
+continue
+copy
+cos
+cosh
+cot
+coth
+csc
+csch
+deg
+delete
+exit
+fact
+filter
+first
+floor
+for
+get
+has
+if
+join
+keys
+l
+length
+log
+log10
+log1p
+loop
+lower
+m
+mandelbrot
+map
+max
+min
+not
+number
+outer
+pairs
+print
+profile_expr
+put
+rad
+rand
+range
+reduce
+relu
+replace
+replace_first
+return
+round
+sec
+sech
+sin
+sinh
+sleep
+slice
+sort
+sort_key
+split
+sqrt
+str
+tan
+tanh
+task
+task_completed
+task_count
+task_join
+task_value
+throw
+time
+title
+try
+type
+undef
+upper
+values
+var
+vars
+while