Add workflow to automatically assign PR reviewers

[CPerezz]

As stated in #423, it would be nice if reviews could be assigned
automatically to a group of reviwers so that the reviewing process is
more agile.

Closes #423

[CPerezz]

Currently affected by a bug: cli/cli#4844

I'm not even sure this PR solved will solve the issues as the main issue is that the token does not provide this permissions directly...

[CPerezz]

Superset by #429

[0xmountaintop]

why not try these?

• https://github.com/marketplace/actions/auto-request-review (I think this one fits our need best)
• https://github.com/marketplace/actions/reviewer-lottery
• https://github.com/cookpad/pick-random-reviewers-action

[0xmountaintop]

why not try these?

• https://github.com/marketplace/actions/auto-request-review (I think this one fits our need best)
• https://github.com/marketplace/actions/reviewer-lottery
• https://github.com/cookpad/pick-random-reviewers-action

[0xmountaintop]

My point is that, seems adding @appliedzkp/zkevm-reviewers in CODEOWNERS only request 1 reviewer? (except zkevm-circuits/src/state_circuit/ and zkevm-circuits/src/state_circuit.rs)

see #434 and #435 for an example

but https://github.com/marketplace/actions/auto-request-review allows randomly selecting n reviewers (n can be configured.)
and also allow selecting specific reviewer for specific files.

seems exactly what we need.

[0xmountaintop]

My point is that, seems adding @appliedzkp/zkevm-reviewers in CODEOWNERS only request 1 reviewer? (except zkevm-circuits/src/state_circuit/ and zkevm-circuits/src/state_circuit.rs)

see #434 and #435 for an example

but https://github.com/marketplace/actions/auto-request-review allows randomly selecting n reviewers (n can be configured.)
and also allow selecting specific reviewer for specific files.

seems exactly what we need.

[CPerezz]

Hi @HAOYUatHZ

My point is that, seems adding @appliedzkp/zkevm-reviewers in CODEOWNERS only request 1 reviewer?

This is done in porpuse. The group is configuref via GitHub and assigns n reviewers automatically.
It was set to one now so that we could test it.

My plan now is to add @icemelon too and if that works, add some Scroll members so that each PR gets assigned 2 reviewers. 1 from Scroll and one from appliedzkp

[0xmountaintop]

Hi @HAOYUatHZ

My point is that, seems adding @appliedzkp/zkevm-reviewers in CODEOWNERS only request 1 reviewer?

This is done in porpuse. The group is configuref via GitHub and assigns n reviewers automatically.

It was set to one now so that we could test it.

My plan now is to add @icemelon too and if that works, add some Scroll members so that each PR gets assigned 2 reviewers. 1 from Scroll and one from appliedzkp

I see.