feat: rename classes

[WindyDante]

fix: add test case for application,Slimmed down the files starting with Casdoor, removed the corresponding toString method, and changed the permission modifier to public."

[casbin-bot]

@seriouszyx @ComradeProgrammer @Resulte please review

[codecov]

Codecov Report

Merging #67 (0c6bc5c) into master (4325543) will not change coverage.
Report is 1 commits behind head on master.
The diff coverage is 0.00%.

@@          Coverage Diff           @@
##           master     #67   +/-   ##
======================================
  Coverage    0.00%   0.00%           
======================================
  Files          44      44           
  Lines        1375    1363   -12     
  Branches       28      28           
======================================
+ Misses       1375    1363   -12     

Files	Coverage Δ
...va/org/casbin/casdoor/exception/AuthException.java	0.00% <ø> (ø)
...n/java/org/casbin/casdoor/exception/Exception.java	0.00% <ø> (ø)
...org/casbin/casdoor/util/ApplicationOperations.java	0.00% <ø> (ø)
...rg/casbin/casdoor/util/OrganizationOperations.java	0.00% <ø> (ø)
...va/org/casbin/casdoor/util/ProviderOperations.java	0.00% <ø> (ø)
...ava/org/casbin/casdoor/util/SessionOperations.java	0.00% <ø> (ø)
.../java/org/casbin/casdoor/util/http/HttpClient.java	0.00% <ø> (ø)
src/main/java/org/casbin/casdoor/entity/Cert.java	0.00% <0.00%> (ø)
...n/java/org/casbin/casdoor/entity/Organization.java	0.00% <0.00%> (ø)
...ain/java/org/casbin/casdoor/entity/Permission.java	0.00% <0.00%> (ø)
... and 29 more

[github-actions]

🎉 This PR is included in version 1.18.0 🎉

The release is available on:

• GitHub release
• v1.18.0

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