* Migrate protostellar files

* Update PS files

* Move generated files

* Updating PS files

* Update tests to use interfaces, skip if Protostellar

* Add management interfaces to classic

* Change datastructures to use interfaces

* Add PS support in Cluster

* add grpc as dependency to composer, update package.xml, add/update scripts

* Add validation check to lookupinresult methods

* Cleaning

* fix style

* revert package.xml update

* Update PS files

* Update PS implementation files

* Update exception mapping per RFC

* Add PermissionDeniedException

* Update package.xml

* Update exception converter

* undo test script changes

* Add support for simple string sorting via FieldSorting

* the wrapper should wait until the core connection is closed in order
  to ensure that the in-flight operations will not use any invalid
  resources

* shutdown logger when the module is being unloaded

* Core update

* Add DocNotLockedException

* Update package.xml

* Only test on >=7.6.0

* clean update package.xml

)

* Add maxTTL check and tests

* Update core and package.xml

* update core to latest

* fix bug with null expiry

---------

Co-authored-by: Sergey Avseyev <[email protected]>

* add static helpers

* consistent builder message for SearchRequest

Hard dependency on gRPC in PHP might be problematic, so by relaxing the
requirement we allow users to choose whether to install gRPC and instead
check its presence runtime and throw exception if couchbase2:// protocol
is being used while the extensions are not loaded.

… locked is same as CAS value after the document gets unlocked (#151)

Co-authored-by: littlefermatlives <[email protected]>

* improve diagnostics
* update feature detection
* ensure that index for beer-sample is loaded before the test run