[explorer] All changes from gdc demo

[stella3d]

All changes under the ./explorer folder on the explorer-rest branch that were made in the run up to GDC.

It is a lot of changes, but picking them apart might be difficult.

The changes to the explorer assume that we have some of the changes to the backend REST api from experimental-rest-api branch, so we want to get that merged in a similar timeframe ideally.

[apburnie]

When https://demo-rpc.sui.io/objects?address= is applied to an object, the backend responds with [] rather than an error message. I've implemented a block that prevents address results from showing in this case.

If you visit https://explorer-demo.sui.io/objects/4ea58a9788562c53fe11f63e2662401d8312b14d and click the Owner value and then click back you will see the problem this is causing.

[666lcz]

Please run

find ./ -name "*.ts" -exec gsed -i -e '1i\/\/ Copyright (c) 2022, Mysten Labs, Inc.\n\/\/ SPDX-License-Identifier: Apache-2.0\n' '{}' \;\n

find ./ -name "*.tsx" -exec gsed -i -e '1i\/\/ Copyright (c) 2022, Mysten Labs, Inc.\n\/\/ SPDX-License-Identifier: Apache-2.0\n' '{}' \;\n

to fix all the license headers, otherwise you will fail this check.

[666lcz]

Approve to unblock

[stella3d]

@666lcz that command doesn't seem to work, always errs with find: gsed: No such file or directory

[666lcz]

brew install gsed

[apburnie]

I've created a PR here #1070. This fixes some bugs, reinstates a working UI test suite, fixes latency issues and splits the view/fetch logic. It also resolves the above issue with Required statuses must pass before merging. The branch has been rebased on this branch to remove any conflicts

[Clay-Mysten]

Retroactive thanks to Stella for excellent doc additions.