Revert "docs: update docs"

This reverts commit fe2856eb2a.

docs/README.md

@@ -1,10 +0,0 @@
-# Documents
-
-## Usage
-
-- Site: https://idrawjs.github.io/
-- Repos: https://github.com/idrawjs/docs
-
-## TODO List
-
-- https://github.com/idrawjs/idraw/issues/53

docs/todo/board.md

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+# @idraw/board
+
+* [x] Calculate screen position to context position
+* [x] Reset board's size

docs/todo/core.md

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+# @idraw/core
+
+* [] add type of TypeElemDesc-key
+* [x] BUG: Type error about keyof TypeElemDesc
+* [x] BUG: Type error about TypeElement'uuid
+* [] Element default data
+* [] Support gradient color
+* [] Listen keyboard action
+* [] Keep all num two decimals
+* [x] Config usage in all code
+* [x] is/check add circle and html
+* [x] make idraw.draw() private
+* [x] remove idraw.initData()
+* Support Element's render
+  * Circle
+    * [x] Render content
+  * Text
+    * [x] Desc backgroundColor
+  * HTML
+    * [x] Render content
+* [x] Change idraw.selectElementByUUID to idraw.selectElementByIndex
+* [x] Change idraw.selectElement use uuid arg
+* [x] License text in JS result
+* [x] Options default data
+* [x] BUG: Select area calculate elements error
+* [x] Move elements that in selected-area
+* [x] Area select
+* [x] Lock Element
+* [x] FireFox's Compatibility Question (And Safair Browser) 
+* [x] Hover element style
+* [x] Cursor style
+* [x] Can't controll element at scroll-area
+* [x] Disable controll element
+* [x] static check/is type declare
+* [x] Force update image/svg image when element change
+* [x] Reset board's size
+* [x] Limit element's angle between -360~360 deg
+* [x] Check if the element and elements' attribute of desc is supported
+* [x] Suport elements'desc and attribute check method
+* [x] Scale canvas
+* [x] Scroll canvas
+* [x] Render by requestAnimateFrame
+* [x] Image load queue
+* [x] Input data by `any` type `core.initData/core.setData`
+* Render data's elements
+  * Basic box
+    * [x] Border
+    * [x] Radius
+    * [] Gradient Color
+  * [x] Text
+    * [x] Text content
+    * [x] Font size
+    * [x] Font family
+    * [x] Font color
+  * Rect
+    * [x] Rect content
+  * Image
+    * [x] Image content
+  * [x] SVG
+    * [x] SVG content
+* [x] Drag elements
+* [x] Move elements' index
+* [x] Rotate elements
+* [x] Transform elements's size
+* [X] Loader update image/svg resource
+

docs/todo/idraw.md

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+# idraw
+
+* [] BUG: iDraw.js can't render image on Mobile browser
+* [x] BUG: Undo/Redo need trigger "changeData" event
+* Export
+  * [] Export image
+  * [] Source file
+* Undo action record
+  * [x] Action records's stack
+  * [x] Return recors's count
+* Redo action record
+  * [x] Action records's stack
+  * [x] Return recors's count

docs/usage/README.md

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+# idraw
+
+// TODO