Allow adapter swapping

[FossPrime]

Marshall states hookContext.params.adapter.model = anotherModel should work... but it doesn't.

context.service.db = anotherLowDBService.db does work however.

Part of the issue is this is based on a service that is not a database adapter... Decoupling the adapter from the service should help. May require minor api changes.

I confirmed with Marshall that this is supposed to work.
https://stackblitz.com/edit/feathers-v5-adapter-swapping?file=app.ts,messages.yaml

Fix may just be moving db to Model

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All the tests are passing... this is just a feature that is not tested for, we should upstream a test for it

> feathers-lowdb@1.0.0-alpha.8 test
> NODE_OPTIONS='' npx mocha --config .mocharc.json --recursive test/**/*.test.ts



  ............................................,............,,.....................
Skipped the following 3 Feathers adapter test(s) out of 73 total:
[
  ".create ignores query",
  ".find + $and",
  ".find + $and + $or"
]
...............
  .......................,............,,.....................
Skipped the following 3 Feathers adapter test(s) out of 73 total:
[
  ".create ignores query",
  ".find + $and",
  ".find + $and + $or"
]


  148 passing (256ms)
  6 pending

npm notice 
npm notice New major version of npm available! 8.19.2 -> 10.1.0
npm notice Changelog: https://github.com/npm/cli/releases/tag/v10.1.0
npm notice Run npm install -g npm@10.1.0 to update!
npm notice 

Worse still... attempting to use the feature causes the service to break.

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Looks like I screwed this up royally... I was supposed to use getModel for my model... but I implemented my own load function.

https://github.com/feathersjs/feathers/blob/dove/packages/mongodb/src/adapter.ts#L98C3-L101C4

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Feathers memory also lacks support for the feature
feathersjs/feathers#3283