SDK 3.2 Collections-first examples

All howtos reviewed, and examples for specific scopes and collections to replace all default collections code samples for 3.3 3.2, with 7.0 GA.

Point back to 3.2 / 3.1 pages for "legacy" default collection examples.

Tickets and PRs:

LCB

.NET (NCBC-2787  

Go (GOCBC-1036 - ) https://github.com/couchbase/docs-sdk-go/pull/134 

Java (JCBC-1755 - ) https://github.com/couchbase/docs-sdk-java/pull/237 

Node.js JSCBC-831  https://github.com/couchbase/docs-sdk-nodejs/pull/119 

PHP (PCBC-737 - ) https://github.com/couchbase/docs-sdk-php/pull/74)

Python PYCBC-1082  https://github.com/couchbase/docs-sdk-python/pull/159

Ruby (RCBC-297 - ) https://github.com/couchbase/docs-sdk-ruby/pull/31 

Scala SCBC-280  https://github.com/couchbase/docs-sdk-scala/pull/44 

Common https://github.com/couchbase/docs-sdk-common/pull/26