Avoid coupling UI with DB layer

[RodriSanchez1]

Needs to move types definition to a different more general location.

Types:

• BoardRecord
• Prompt

New types location options:

• src/db/services/Board/types.ts
• src/db/services/Board/model.ts
• src/types/Board.ts
• src/models/Board.ts

//Example of new types for Prompt

export type Prompt = {
  description: string;
  rows: number;
  columns: number;
  colorScheme: 'fitzgerald' | 'something-else' | 'foo';
  shouldUsePictonizer: boolean;
};

export type DBPrompt = Prompt & {
  userId: string;
  createdAt: Date;
};

export type UIPrompt = Prompt & {
  state: 'loading' | 'success' | 'error';
};

What do you think? @tomivm @maxicapodacqua