refactor: Changed paths for lens migration in CLI

[ChrisBQu]

Relevant issue(s)

Resolves #2291

Description

The following commands were currently in the CLI:

defradb client schema migration down
defradb client schema migration reload
defradb client schema migration set
defradb client schema migration set-registry
defradb client schema migration up

With these changes, they instead become:

defradb client lens down
defradb client lens reload
defradb client lens set
defradb client lens set-registry
defradb client lens up

This brings them more in line with how they are named in the Http client.

Tasks

• I made sure the code is well commented, particularly hard-to-understand areas.
• I made sure the repository-held documentation is changed accordingly.
• I made sure the pull request title adheres to the conventional commit style (the subset used in the project can be found in tools/configs/chglog/config.yml).
• I made sure to discuss its limitations such as threats to validity, vulnerability to mistake and misuse, robustness to invalidation of assumptions, resource requirements, ...

How has this been tested?

Specify the platform(s) on which this was tested:

• Windows

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.55%. Comparing base (2cadb13) to head (59327b8).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3510      +/-   ##
===========================================
+ Coverage    78.48%   78.55%   +0.08%     
===========================================
  Files          397      397              
  Lines        37599    37599              
===========================================
+ Hits         29506    29535      +29     
+ Misses        6400     6379      -21     
+ Partials      1693     1685       -8     

Flag	Coverage Δ
all-tests	78.55% <100.00%> (+0.08%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
cli/cli.go	100.00% <100.00%> (ø)
cli/lens.go	100.00% <100.00%> (ø)
cli/lens_down.go	37.29% <100.00%> (ø)
cli/lens_reload.go	60.00% <100.00%> (ø)
cli/lens_set.go	71.19% <100.00%> (ø)
cli/lens_set_registry.go	46.43% <100.00%> (ø)
cli/lens_up.go	37.29% <100.00%> (ø)

... and 13 files with indirect coverage changes

---

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[AndrewSisley]

LGTM! Thanks Chris, maybe keep this one open a few more hours if it isn't blocking you in case anyone has any strong opinions.

I don't really mind which direction this is changed in, but do prefer that http and cli are aligned.

[fredcarle]

LGTM. Thanks for making this set of command align with the HTTP handlers.