create readme for compliance hub

Author: ekin-burak

plugins/compliance-hub/README.md

@@ -0,0 +1,28 @@
+# Compliance Hub plugin
+
+## File structure
+File structure follows usual Countly plugin structure
+```
+compliance-hub/
+├── api/ 
+│    └── api.js                               # compliance hub API for managing user consent and related metrics    
+├── frontend/
+│   ├── public
+│   │    ├── javascripts
+│   │    │    ├── countly.models.js           # model code for consent management
+│   │    │    └── countly.views.js            # views code.
+│   │    ├── localization                     # all localization files
+│   │    ├── stylesheets
+│   │    └──  templates
+│   │         ├── consentHistory.html         # template for consent history table
+│   │         ├── exportHistory.html          # template for export history
+│   │         ├── main.html                   # compliance hub header 
+│   │         ├── metrics.html                # consent metrics dashboard
+│   │         ├── user.html                   # user consent data table
+│   │         └── userConsentHistory.html     # user consent history table
+│   └── app.js
+├── install.js
+├── package.json
+├── README.md
+└── tests.js                                  # plugin tests
+```