fix(sdk): add instance option for instantiable SDKs

[mrlubos]

Closes #926

Related to #940
Related to #1932
Related to #671

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🦋 Changeset detected

Latest commit: dc7535e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@hey-api/openapi-ts	Minor

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[codecov]

Codecov Report

Attention: Patch coverage is 10.12658% with 497 lines in your changes missing coverage. Please review.

Project coverage is 21.85%. Comparing base (4371393) to head (dc7535e).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...s/openapi-ts/src/plugins/@hey-api/sdk/operation.ts	4.02%	310 Missing ⚠️
...ckages/openapi-ts/src/plugins/@hey-api/sdk/auth.ts	2.59%	75 Missing ⚠️
...ages/openapi-ts/src/plugins/@hey-api/sdk/plugin.ts	9.21%	69 Missing ⚠️
packages/openapi-ts/src/compiler/utils.ts	12.50%	14 Missing ⚠️
...napi-ts/src/plugins/@tanstack/query-core/plugin.ts	25.00%	9 Missing ⚠️
...ages/openapi-ts/src/plugins/@hey-api/sdk/config.ts	14.28%	6 Missing ⚠️
packages/openapi-ts/src/compiler/types.ts	0.00%	4 Missing ⚠️
packages/openapi-ts/src/utils/transform.ts	40.00%	3 Missing ⚠️
packages/openapi-ts/src/compiler/classes.ts	85.71%	2 Missing ⚠️
...enapi-ts/src/plugins/@hey-api/sdk/plugin-legacy.ts	81.81%	2 Missing ⚠️
... and 3 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2130      +/-   ##
==========================================
- Coverage   21.90%   21.85%   -0.06%     
==========================================
  Files         269      271       +2     
  Lines       24829    24957     +128     
  Branches      864      865       +1     
==========================================
+ Hits         5439     5454      +15     
- Misses      19384    19497     +113     
  Partials        6        6              

Flag	Coverage Δ
unittests	21.85% <10.12%> (-0.06%)	⬇️

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commit: dc7535e