docs(instance): add support for resource description

[remyleone]

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 24 lines in your changes missing coverage. Please review.
✅ Project coverage is 1.68%. Comparing base (f826d8c) to head (290c8b7).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
internal/services/instance/ip_data_source.go	0.00%	2 Missing ⚠️
...al/services/instance/security_group_data_source.go	0.00%	2 Missing ⚠️
internal/services/instance/server_data_source.go	0.00%	2 Missing ⚠️
...vices/instance/data_source_instance_private_nic.go	0.00%	1 Missing ⚠️
internal/services/instance/image.go	0.00%	1 Missing ⚠️
internal/services/instance/image_data_source.go	0.00%	1 Missing ⚠️
internal/services/instance/ip.go	0.00%	1 Missing ⚠️
internal/services/instance/ip_reverse_dns.go	0.00%	1 Missing ⚠️
internal/services/instance/placement_group.go	0.00%	1 Missing ⚠️
...l/services/instance/placement_group_data_source.go	0.00%	1 Missing ⚠️
... and 11 more

Additional details and impacted files

@@          Coverage Diff           @@
##           master   #3537   +/-   ##
======================================
  Coverage    1.67%   1.68%           
======================================
  Files         428     428           
  Lines       46746   46767   +21     
======================================
+ Hits          785     787    +2     
- Misses      45873   45893   +20     
+ Partials       88      87    -1     

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