doc: add API parameter syntax examples for nodeofferings and nodetemp…

[chunkyen]

Description

The API documentation for createKubernetesCluster does not include syntax examples for the nodeofferings and nodetemplates parameters, making it difficult for users to specify different service offerings and templates for control vs worker nodes.

This PR adds usage examples to the @Parameter descriptions, following the same inline example pattern already used by the cniconfigdetails parameter in the same file.

Examples added

nodeofferings:
nodeofferings[0].node="control"&nodeofferings[0].offering=""&
nodeofferings[1].node="worker"&nodeofferings[1].offering=""

nodetemplates:
nodetemplates[0].node="control"&nodetemplates[0].template=""&
nodetemplates[1].node="worker"&nodetemplates[1].template=""

Context

Discussion: #13395

Thanks to @Pearl1594 for providing the syntax and @DaanHoogland for guiding the contribution process.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Documentation change (API parameter descriptions)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• Code formatted according to project style
• Self-reviewed the changes
• No new warnings generated
• Documentation updated (this IS the documentation update)

[boring-cyborg]

Congratulations on your first Pull Request and welcome to the Apache CloudStack community! If you have any issues or are unsure about any anything please check our Contribution Guide (https://github.com/apache/cloudstack/blob/main/CONTRIBUTING.md)
Here are some useful points:

• In case of a new feature add useful documentation (raise doc PR at https://github.com/apache/cloudstack-documentation)
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[DaanHoogland]

clgtm

[DaanHoogland]

note: text only

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 19.65%. Comparing base (121d931) to head (2afb902).

Additional details and impacted files

@@             Coverage Diff              @@
##              main   #13902       +/-   ##
============================================
+ Coverage     3.41%   19.65%   +16.23%     
- Complexity       0    19792    +19792     
============================================
  Files          487     6368     +5881     
  Lines        41867   574889   +533022     
  Branches      7912    70353    +62441     
============================================
+ Hits          1429   112975   +111546     
- Misses       40238   449643   +409405     
- Partials       200    12271    +12071     

Flag	Coverage Δ
uitests	3.41% <ø> (ø)
unittests	20.92% <ø> (?)

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