Reorganize MVP package for multi-service architecture

[bbengfort]

Scope of changes

Moves server package to ensign package and refactors top level packages to move to the ensign package so other services such as tenant and quarterdeck can be defined at the package level. Note: keeping the api and mimetype packages at the top level so they can be imported by client code.

Fixes SC-9453

Type of change

• new feature
• bug fix
• documentation
• testing
• technical debt
• other (describe)

Acceptance criteria

Just reorganization so should be able to sign off on this if the tests pass!

Author checklist

• I have manually tested the change and/or added automation in the form of unit tests or integration tests
• I have updated the dependencies list
• I have recompiled and included new protocol buffers to reflect changes I made
• I have added new test fixtures as needed to support added tests
• Check this box if a reviewer can merge this pull request after approval (leave it unchecked if you want to do it yourself)
• I have moved the associated Shortcut story to "Ready for Review"

Reviewer(s) checklist

• Any new user-facing content that has been added for this PR has been QA'ed to ensure correct grammar, spelling, and understandability.
• I understand the new package structure
• The tests are passing

[shortcut-integration]

This pull request has been linked to Shortcut Story #9453: Reorganize MVP package for multi-service architecture.

[codecov]

Codecov Report

Merging #11 (3bba2e2) into main (26beead) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #11   +/-   ##
=======================================
  Coverage   67.33%   67.33%           
=======================================
  Files          12       12           
  Lines         701      701           
=======================================
  Hits          472      472           
  Misses        199      199           
  Partials       30       30           

Flag	Coverage Δ
unittests	67.33% <ø> (ø)

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

Impacted Files	Coverage Δ
...ithub.com/rotationalio/ensign/pkg/server/events.go
...c/github.com/rotationalio/ensign/pkg/config/env.go
...ithub.com/rotationalio/ensign/pkg/config/config.go
...ithub.com/rotationalio/ensign/pkg/server/server.go
...ithub.com/rotationalio/ensign/pkg/server/status.go
...rc/github.com/rotationalio/ensign/pkg/rlid/rlid.go
...ub.com/rotationalio/ensign/pkg/server/o11y/o11y.go
...ithub.com/rotationalio/ensign/pkg/ensign/status.go	76.92% <0.00%> (ø)
...ub.com/rotationalio/ensign/pkg/ensign/rlid/rlid.go	95.23% <0.00%> (ø)
...ithub.com/rotationalio/ensign/pkg/ensign/events.go	0.00% <0.00%> (ø)
... and 4 more

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