feat(repository): apply select query

Author: jaredcnance

src/JsonApiDotNetCore/Data/DefaultEntityRepository.cs

@@ -48,7 +48,7 @@ public DefaultEntityRepository(
 
         public virtual IQueryable<TEntity> Get()
         {
-            return _dbSet;
+            return _dbSet.Select(_jsonApiContext.QuerySet?.Fields);
         }
 
         public virtual IQueryable<TEntity> Filter(IQueryable<TEntity> entities,  FilterQuery filterQuery)
@@ -76,12 +76,12 @@ public virtual IQueryable<TEntity> Sort(IQueryable<TEntity> entities, List<SortQ
 
         public virtual async Task<TEntity> GetAsync(TId id)
         {
-            return await _dbSet.SingleOrDefaultAsync(e => e.Id.Equals(id));
+            return await Get().SingleOrDefaultAsync(e => e.Id.Equals(id));
         }
 
         public virtual async Task<TEntity> GetAndIncludeAsync(TId id, string relationshipName)
         {
-            return await _dbSet
+            return await Get()
                 .Include(relationshipName)
                 .SingleOrDefaultAsync(e => e.Id.Equals(id));
         }