Adding YaoBraketExt as a weak dependency

[ruihao-li]

As discussed with @Roger-luo, this extension is to be added to Yao after Julia 1.9 release. The implementation is migrated from https://github.com/ruihao-li/YaoBlocksBraket.jl, which allows Yao users to convert their circuits to Braket circuits that can be subsequently run on AWS devices.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.24%. Comparing base (728aac7) to head (3a50d2d).
⚠️ Report is 259 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #464      +/-   ##
==========================================
- Coverage   89.27%   88.24%   -1.03%     
==========================================
  Files          50       67      +17     
  Lines        3085     4578    +1493     
==========================================
+ Hits         2754     4040    +1286     
- Misses        331      538     +207     

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[Roger-luo]

Thanks for the contribution! As I had a look at the code before, we just need to wait for CI to pass