Fix OpenAPI example extraction

[987Nabil]

fixes #2609
/claim #2609

• fix example tuple deconstruction
• fix example either deconstruction
• handover examples correctly to path codecs

@jdegoes I see how I can deconstruct tuple examples for combined codecs. But for alternation, we don't have a type class that helps us to deconstruct.
I would add in the docs, that we don't support this for open api gen and that instead of calling inExamples on the endpoint, ppl should call ContentCodec.content[A].examples(...) | ContentCodec.content[B].examples(...).
wdyt?

[jdegoes]

@987Nabil Alternator does have destruction:

See here.

[987Nabil]

@jdegoes I missed it, because it was missing from the parameters of Fallback. I will add it, so it can be used later. Then it should be possible to make it work 👍

[codecov-commenter]

Codecov Report

Attention: 44 lines in your changes are missing coverage. Please review.

Comparison is base (a9a2204) 64.84% compared to head (748832b) 65.38%.
Report is 5 commits behind head on main.

Files	Patch %	Lines
...n/scala/zio/http/endpoint/openapi/OpenAPIGen.scala	60.86%	18 Missing ⚠️
...ared/src/main/scala/zio/http/codec/PathCodec.scala	44.00%	14 Missing ⚠️
.../main/scala/zio/http/codec/internal/Mechanic.scala	33.33%	4 Missing ⚠️
...ared/src/main/scala/zio/http/codec/HttpCodec.scala	91.17%	3 Missing ⚠️
...d/src/main/scala/zio/http/codec/SegmentCodec.scala	75.00%	2 Missing ⚠️
...n/scala/zio/http/endpoint/openapi/JsonSchema.scala	60.00%	2 Missing ⚠️
...scala/zio/http/codec/internal/AtomizedCodecs.scala	0.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2635      +/-   ##
==========================================
+ Coverage   64.84%   65.38%   +0.54%     
==========================================
  Files         144      144              
  Lines        8488     8407      -81     
  Branches     1582     1532      -50     
==========================================
- Hits         5504     5497       -7     
+ Misses       2984     2910      -74     

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