Add `goweight` as a linter to this project

[tstirrat15]

Prior art: authzed/spicedb#2449

The idea is that because this is a client binary that we distribute, we probably want to keep it within a reasonable size, and be aware of any one dependency that balloons the size of the binary.

Ideally we'd run this in CI and it would produce a report of some sort and fail if it's above a certain threshold; it'd be nice too if there was a way to have it report how much a change increased or decreased the binary size (which could be ignored under most circumstances).

[miparnisari]

Ironically, the current culprit of zed's size is... SpiceDB itself.

 ~/Documents/GitHub/zed (main) $ goweight ./cmd/zed/main.go 
execute: go build -C /Users/miparnisari/Documents/GitHub/zed -o goweight-bin-target -work -a ./cmd/zed/main.go
    Size Module
   33 MB github.com/authzed/spicedb/pkg/cmd/server
   27 MB k8s.io/api/core/v1
   26 MB github.com/authzed/authzed-go/proto/authzed/api/v1
   25 MB github.com/jackc/pgx/v5/pgtype
   14 MB runtime
   13 MB cloud.google.com/go/spanner
   13 MB github.com/envoyproxy/go-control-plane/envoy/config/core/v3

These are the things we import. Maybe if we could move all these to a separate repo, we could reduce the size of the binary 🤔

 $ grep -rohE '"github.com/authzed/spicedb[^"]+"' . | sort -u
"github.com/authzed/spicedb/pkg/caveats/types"
"github.com/authzed/spicedb/pkg/cmd/datastore"
"github.com/authzed/spicedb/pkg/cmd/server"
"github.com/authzed/spicedb/pkg/cmd/util"
"github.com/authzed/spicedb/pkg/composableschemadsl/compiler"
"github.com/authzed/spicedb/pkg/composableschemadsl/generator"
"github.com/authzed/spicedb/pkg/composableschemadsl/input"
"github.com/authzed/spicedb/pkg/datastore"
"github.com/authzed/spicedb/pkg/development"
"github.com/authzed/spicedb/pkg/diff"
"github.com/authzed/spicedb/pkg/genutil/mapz"
"github.com/authzed/spicedb/pkg/namespace"
"github.com/authzed/spicedb/pkg/proto/core/v1"
"github.com/authzed/spicedb/pkg/proto/developer/v1"
"github.com/authzed/spicedb/pkg/releases"
"github.com/authzed/spicedb/pkg/schema"
"github.com/authzed/spicedb/pkg/schemadsl/compiler"
"github.com/authzed/spicedb/pkg/schemadsl/generator"
"github.com/authzed/spicedb/pkg/schemadsl/input"
"github.com/authzed/spicedb/pkg/spiceerrors"
"github.com/authzed/spicedb/pkg/tuple"
"github.com/authzed/spicedb/pkg/validationfile"
"github.com/authzed/spicedb/pkg/validationfile/blocks"