chore: update manager e2e tests

[achou11]

Addresses the testing task for #236

Reorganizes the manager tests to have the following structure:

1. Basic operations based on created projects
2. Basic operations based on just added projects
3. Basic operations based on both created and added projects
4. All of the rest related to the manager

There's probably some redundancy in 1-3 so open to changes there.

[achou11]

just realizing that there's some overlap with the project-settings e2e tests we have. think the redundancy is fine for now since we only really have settings to work with at the moment, but just noting that in case someone else notices this too

[gmaclennan]

Looks ok to me and all tests pass, so all good.

Could you check whether without the fix in 5a2f8a1 do these tests fail (they should)

[achou11]

Could you check whether without the fix in 5a2f8a1 do these tests fail (they should)

yep reverting that fix and running the test locally i get the following error:

# Managing both created and added projects
    ok 1 - should be equal
    ok 2 - created project is listed
    ok 3 - added project is listed
    ok 4 - expected truthy value
/Users/andrewchou/GitHub/digidem/mapeo-core-next/node_modules/protobufjs/src/reader.js:382
            throw Error("invalid wire type " + wireType + " at offset " + this.pos);
                  ^

Error: invalid wire type 6 at offset 1
    at Reader.skipType (/Users/andrewchou/GitHub/digidem/mapeo-core-next/node_modules/protobufjs/src/reader.js:382:19)
    at Object.decode (file:///Users/andrewchou/GitHub/digidem/mapeo-core-next/src/generated/keys.js:118:20)
    at #decodeProjectKeysCipher (file:///Users/andrewchou/GitHub/digidem/mapeo-core-next/src/mapeo-manager.js:74:24)
    at MapeoManager.getProject (file:///Users/andrewchou/GitHub/digidem/mapeo-core-next/src/mapeo-manager.js:192:54)
    at file:///Users/andrewchou/GitHub/digidem/mapeo-core-next/test-e2e/manager-basic.js:209:38
    at async Test._run (/Users/andrewchou/GitHub/digidem/mapeo-core-next/node_modules/brittle/index.js:573:7)