Generic components

Currently there are 2 generic components (PFB). Very soon I will add DEMO components which will show how to use them.

1. datatable: Generic datatable which uses standard lightning-datatable for showing records in table
   

   1. Gets data from database automatically. Can use relationship fields also.
      
   2. Sort functionality
      
   3. Pagination - first, previous, next and last pages
      
   4. Persistant selection of records across pages. getSelectedRows public method to get selected data.
      
   5. All events of lightning-datatable plus event while loading data
      
   6. Cacheable data
      
   7. Sosl search
      
   8. Dynamically change data filters
      

2. upload: Currently implemented only for admins (without shareable)
   

   1. Use component in create form wherein, the file has to be uploaded before record (like account or case etc) is created.
      
   2. Share records with other users
      
   3. Search for files
      
   4. Delete files
      
   5. Used datatable for showing records which gives all the functionality like sort, pagination etc