Added .xreplace() to Vector and Dyadic

[sidhu1012]

References to other Issues or PRs

Fixes #20445

Brief description of what is fixed or changed

Physics Vector and Dyadic is missing core sympy methods. This PR adds .xreplace() to these classes.

Other comments

Release Notes

• physics.vector
  • Added .xreplace() to Vector Class.
  • Added .xreplace() to Dyadic Class.

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• physics.vector

  • Added .xreplace() to Vector Class. (#20446 by @sidhu1012)

  • Added .xreplace() to Dyadic Class. (#20446 by @sidhu1012)

This will be added to https://github.com/sympy/sympy/wiki/Release-Notes-for-1.8.

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#### References to other Issues or PRs
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Fixes #20445 

#### Brief description of what is fixed or changed
Physics Vector and Dyadic is missing core sympy methods. This PR adds .xreplace() to these classes.

#### Other comments


#### Release Notes

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<!-- BEGIN RELEASE NOTES -->
* physics.vector
    * Added .xreplace() to Vector Class.
    * Added .xreplace() to Dyadic Class.
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Update

The release notes on the wiki have been updated.

[codecov]

Codecov Report

Merging #20446 (83df99b) into master (66de4b6) will decrease coverage by 0.008%.
The diff coverage is 100.000%.

@@              Coverage Diff              @@
##            master    #20446       +/-   ##
=============================================
- Coverage   75.766%   75.757%   -0.009%     
=============================================
  Files          673       673               
  Lines       174148    174402      +254     
  Branches     41112     41202       +90     
=============================================
+ Hits        131945    132122      +177     
- Misses       36491     36562       +71     
- Partials      5712      5718        +6     

[sidhu1012]

@moorepants It's ready for review.

[sidhu1012]

@moorepants Shall I start working to add .simplify method, while this PR is in review?

[moorepants]

@moorepants Shall I start working to add .simplify method, while this PR is in review?

I believe they already have .simplify().

[sidhu1012]

I believe they already have .simplify().

What's next to be added? I'm up for it!

[moorepants]

What's next to be added? I'm up for it!

If you want to work on other things, I recommend finding open issues in the issue tracker.

[sidhu1012]

If you want to work on other things, I recommend finding open issues in the issue tracker.

Yes, I'm doing that. Here #18064 (comment) you said more core methods are to be added, so I asked.

[moorepants]

Yes, I'm doing that. Here #18064 (comment) you said more core methods are to be added, so I asked.

I don't know others off the top of my head. You can always add everything that an expression has to make them 1-to-1 with expressions, but I'm not sure its worth it until someone presents a use case.

[sidhu1012]

@moorepants Please review, I have corrected the docstrings and have made them follow numpy conventions.

[sidhu1012]

Closing and opening to restart tests.

[sidhu1012]

@moorepants Please Review.

[moorepants]

Thanks @sidhu1012! LGTM.