Implement an authorization model for BCentral

[anupama-pathirage]

@Dilhasha cloned issue wso2-enterprise/ballerina-registry#2532 on 2024-04-01:

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$subject as described in https://docs.google.com/document/d/1U8Vx_UTuCB_4dVkH-sQbNm8BS902QV4ijYGEee0Tk24/edit?usp=sharing

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[anupama-pathirage]

@Dilhasha commented on 2024-05-21:

• [x] Setup local spiceDB demo setup

• [x] Design the spiceDB schema to utilize resource-based authorization using spiceDB

• [x] Implement auth API with functions to add relations and check permissions

• [x] Application code improvements - Admin API to add and delete schema

• [ ] Application code improvements- Migration of existing data to spicedb

• [ ] Application code improvements - Changes to microservices to add relations and check permissions from spicedb

  - Org API changes - add team, add org user roles, create package
  
  - Package API changes

• [ ] Deployment of spiceDB @anuruddhal