feat: paragraphStructureAdded

[TurboContract]

• added parapraph support:

1. new ElementType - paragraph that connects text elements in one structure
   export interface IParagraph {
   id?: string | undefined
   v?: string[] // variation id
   r?: IElement[] // text elements (runs)
   size?: number
   bold?: boolean
   spacing?: {
   before?: number
   after?: number
   firstLine?: number // firstLine
   }
   rowFlex?: RowFlex
   }
2. also added footnotes support

• new input, enter, backspace work to control it

Performance issue: When inputting data with a large number of pages (15+), the rendering time significantly increases, causing noticeable delays even with minor changes. This needs optimization.