feat: make it easier to load custom plugins

ci: test the http clients

dep: update go-multiaddr-dns

fixes #6485

document the debug script

fixes #6457

Extract provider module to `go-ipfs-provider`

ignore stale API files and deprecate ipfs repo fsck

This command is no longer necessary and is quite dangerous:

1. All lockfiles are now released by the OS when the daemon stops.
2. The API file is ignored when (a) the repo is initialized and (b) daemon is
off.

fixes #6435

Fix node construction queue error

fixes #5784

1. Allow loading from arbitrary and multiple directories.
2. Make it possible to directly load built-in plugins that _aren't_ in the
preload list.

dep: update badger/eventbus

There was a panic in the old version.

revert to v1.6

dep: update swarm/maddr-filter

Reduces allocations/CPU when handling many inbound connections.

Update the required go version in the README

dep: update go-libp2p@0.2.0 to fix go-libp2p-core breakage

License: MIT
Signed-off-by: Jakub Sztandera <kubuxu@protonmail.ch>

Update go-ds-badger

Use replace to require go-libp2p-core@0.0.3
License: MIT
Signed-off-by: Jakub Sztandera <kubuxu@protonmail.ch>

dep: update go-bitswap and go-libp2p-kad-dht

Reduces long-term allocations.

dep: update bitswap

fixes a critical panic