add start of documentation

documentation.md

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+# Functions
+
+## IO
+
+`(open path)`
+
+`(export path type quality)`
+
+`(draw path rect)`
+
+`(resize width height)`
+
+`(crop rect)`
+
+`(folder path)` 
+
+`(exit)`
+
+## Logic
+
+`(gt a b)` check if `a` is greater than `b`
+
+`(lt a b)` check if `a` is lower than `b`
+
+`(eq a b)` check if `a` is equal to `b`
+
+`(and a b <c d...>)` returns true if all conditions are true
+
+`(or a b <cd...>)` returns true if at least one condition is true
+
+## Arrays
+
+`(map function array)`
+
+`(filter function array)`
+
+`(reduce function array accumulator)`
+
+`(len array)`
+
+`(first array)`
+
+`(last array)`
+
+`(rest array)`
+
+`(range start end step)`
+
+## Shapes
+
+`(pos x y)`
+
+`(size w h)`
+
+`(rect x y w h t)`
+
+`(circle x y r)`
+
+`(line start end)`
+
+`(text x y g string font)`
+
+`(svg data)`
+
+## Helpers
+
+`(frame)`
+
+`(center)`
+
+`(scale rect width height)`
+
+## Copy/Paste
+
+`(clone start end)` clone start `rect` into end `rect`
+
+`(stroke shape thickness color)`
+
+`(fill shape color)`
+
+`(clear shape)`
+
+## Objects
+
+`(get item key <keys>)`
+
+`(set item key val)`
+
+## Colors
+
+`(theme variable)`
+
+`(gradient (x1,y1,x2,y2) colors)`
+
+`(pixels rect function q)`
+
+`(saturation pixel q)`
+
+`(contrast pixel q)`
+
+## Math
+
+`(add ...values)`
+
+`(sub...values)`
+
+`(mul ...values)`
+
+`(div ...values)`
+
+`(mod a b)`
+
+`(clamp value min max)`
+
+`(step value step)`
+
+`(min a b)`
+
+`(max a b)`
+
+`(ceil value)`
+
+`(floor value)`
+
+`(sin a)`
+
+`(cos a)`
+
+`PI, TWO_PI`
+
+`(random)`
+
+`(random start end)`
+
+`(random max)`
+
+## Generics
+
+`(echo args)`
+
+`(str args)`
+
+`(test name value expectedValue)`
+
+## Livecoding
+
+`(time)` returns timestamp in milliseconds
+
+## Javascript interop
+
+`js`
+
+## Client
+
+`ronin`