[created] crud for activity.js

[rahulsingh2312]

Description

[created] crud for activity.js
fixed a error at .models/activityBlueprint.js

Fixes

#216

Checklist

• CRUD
• eslint on those 2 files
• error explained below

error fix naming error :

before :

after :

async function update(filter, updateObject, options = { multi: true }) {

  const updateResult = await ActivityBlueprint.updateMany(filter, { $set: updateObject }, options);

  return updateResult.acknowledged;
}

[TejasNair9977]

LGTM