Add Embed option for single attributes

[trisch-me]

Adds embedded option for specific attribute (first part of open-telemetry/build-tools#240)

[codecov]

Codecov Report

Attention: Patch coverage is 56.00000% with 11 lines in your changes missing coverage. Please review.

Project coverage is 74.2%. Comparing base (77d0d9b) to head (ca71137).

❗ Current head ca71137 differs from pull request most recent head f489b30

Please upload reports for the commit f489b30 to get more accurate results.

Files	Patch %	Lines
crates/weaver_resolver/src/attribute.rs	53.8%	6 Missing ⚠️
crates/weaver_resolved_schema/src/lineage.rs	50.0%	5 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main    #212     +/-   ##
=======================================
+ Coverage   73.5%   74.2%   +0.7%     
=======================================
  Files         45      44      -1     
  Lines       2983    2960     -23     
=======================================
+ Hits        2194    2199      +5     
+ Misses       789     761     -28     

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[lquerel]

LGTM

[lquerel]

@trisch-me could you update your PR with the last main branch so we could include this PR in the next release. Thanks

[trisch-me]

@lquerel I have updated and added tests. local coverage shows me 68%.

[lquerel]

LGTM.