Migrate deck@v1.29.2 library code into this repo

[rainest]

Copy the konnect, cprint, crud, diff, dump, file, scripts, state, types, and utils packages from https://github.com/Kong/deck/releases/tag/v1.29.2 (also the current tip of main) into this repository's pkg dir.

Update references to those packages from their deck location to this repository.

Run:

go mod init "github.com/kong/go-database-reconciler"
go mod tidy

Add replace directive from deck go.mod.

Run:

go get github.com/alecthomas/jsonschema@v0.0.0-20191017121752-4bb6e3fae4f2
go mod tidy

This library is apparently rather out of date in deck and has had breaking changes since it was added. After this downgrade, go vet ./... no longer shows errors.

[rainest]

Between the template hook issue and lack of some lint configuration, this needs #8 first and a rebase after.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[GGabriele]

@rainest all this is a "hard" copy of the existing decK packages, right? Is there anything specific to call out that differs from the "base" repo? Otherwise, this LGTM (preventively approving this)

[rainest]

It's copying the libraries as-is, yes. Only change is the package paths in internal references.