Typedoc API task generates non-public exports

[damyanpetev]

Description

Typedoc API task generates globals not exported through public_api.ts or in other words stuff that are not intended for user apps and can't be imported from 'igniteui-angular';.

I realize the typedoc generation was moved to the entire project folder for search purposes and we can go through and mark stuff @hidden. However, as you can see from the links below even on older prod deploys where non-public API is generated - the search is still iffy. Might not be related issues after all.

Steps to reproduce

Try some of the following links.

Note: This list is by no means exhaustive, just the few I noticed. There are prob way more using master.

Enums:
ExcelFileTypes (prod | staging)
ExcelFolderTypes (prod | staging)
ICON_POSITION staging

Classes:
AppFile (prod | staging)
CharSeparatedValueData (prod | staging)
ContentTypesFile (prod | staging)
DataGenerator staging
ExportUtilities (prod | staging)
HVirtualHelperComponent (prod | staging)
IgxAmPmItemDirective (prod | staging)
IgxComboAddItemDirective staging
IgxDialogActionsDirective (prod | staging)
IgxHourItemDirective (prod | staging)
MaskHelper (prod | staging)
IgxScrollInertiaDirective staging

Variables:
MASK_FLAGS (prod | staging)

Functions:
DeprecateClass, DeprecateMethod, DeprecateProperty

Object literals:
KEYS (prod | staging)

Result

Non public API is included in the generation.

Expected result

API pages should generate from public API only