D-Net

Added missing files from previous commit about DivId and DivHelpContent

1. Added DivId class and API : special classes to be used by explore portal pages which have steps
2. Added DivHelpContent class and API
3. Added parameter 'div' (true/false) in '/community' to get communities related to some divIds
4. Added parameter 'div' (true/false) in '/community/{pid}/pages' to get pages of a community, which are related to some divIds...

1. Change Community methods - use pid (community) to query (GET requests)
2. community/{pid}/page/toggle & community/{pid}/entity/toggle - use pid to identify community
3. New (/pagehelpcontent/save) and Update (/pagehelpcontent/update) APIs for helpcontents separated...

'pid' field added in entities and communities for queries by portal | page help contents ordered by placement and order when returned | api to get page help contents by community name or community id (again ordered): '/pagehelpcontent?community=' or '/pagehelpcontent?communityId=' | api to get specific page of community: '/community/{id}/pages?page_route='

new Community has enabled all pages and entities | Toggle multiple community pages/entities at once

Community and Entity class created | All Classes and APIs configured according to OpenAIRE (Community's APIs may change)

initial commit <3