Add Deposit and InitializeAccount types

[mj850]

Describe your changes and provide context

Adds the Deposit and InitializeAccount types to the CT module.

Testing performed to validate your change

Unit tests

[codecov]

Codecov Report

Attention: Patch coverage is 69.20152% with 81 lines in your changes missing coverage. Please review.

Project coverage is 61.13%. Comparing base (32c89cd) to head (873d84f).
Report is 31 commits behind head on feature/ct_types.

Files with missing lines	Patch %	Lines
x/confidentialtransfers/types/msgs.go	63.82%	41 Missing and 10 partials ⚠️
x/confidentialtransfers/types/zk.go	80.90%	14 Missing and 7 partials ⚠️
x/confidentialtransfers/types/codec.go	25.00%	9 Missing ⚠️

Additional details and impacted files

@@                 Coverage Diff                  @@
##           feature/ct_types    #1921      +/-   ##
====================================================
- Coverage             61.36%   61.13%   -0.23%     
====================================================
  Files                   263      270       +7     
  Lines                 23306    24201     +895     
====================================================
+ Hits                  14301    14796     +495     
- Misses                 8001     8323     +322     
- Partials               1004     1082      +78     

Files with missing lines	Coverage Δ
x/confidentialtransfers/types/codec.go	40.00% <25.00%> (ø)
x/confidentialtransfers/types/zk.go	63.42% <80.90%> (ø)
x/confidentialtransfers/types/msgs.go	61.21% <63.82%> (ø)

... and 5 files with indirect coverage changes