… definition directory alternative (DynamoDS#10208)
* Add common package folder location similar to common definitions directory to PathManager
* Initalize common package directory
* Add a list of root directories to verify certificates and check those before adding the package
* fix null value check
* Update comments
* Modify package and package loader to only check libraries defined in pkg.json manifest
* Check view extension for valid signed certificate if path matches root to check
* Upate extension loader to validate extension have valid certificate if they are found in directories requiring verification
* Rename package property for to RequiresSignedEntryPoints
* Fix bugs in package loader signed check
* Revise view extension / extension loading logic to avoid ext deff pointing to dll outside of check dir
* Comments
* Package PR comments
* Extension loading pr comments
* View extension pr comments
* On more comment
* Refactor .Net assembly cetificate verication to DynamoCrypto
* Consume validate method from DyanmoCrypto
* Add comments
* Move cert verification method to DynamoUtilities Class
* Add new CertificateVerification class to DynamoUtilities
* Update comments
* Extract package error messages to resource files
* Add comments and change RequiresSignedEntryPoints to internal
* Add test Cases for signed packages
(cherry picked from commit 717bb16)

* Add untitlity test
(cherry picked from commit 2fcd3b5)
* Fix lib tests
(cherry picked from commit 7ae1302)
* Add check to package property
(cherry picked from commit 8e1bc3c)
* Mark test for failure
(cherry picked from commit 32d7a2d)

* Update the signed package file to uniqure namespace
(cherry picked from commit 0005f38)
* Add comment including the zt node
(cherry picked from commit 16c28de)
* Update comment
(cherry picked from commit 75346ca)