chore: add standard devenv.nix #5

...i.com/oss/libraries/go/utilities/pathfinder/@v/v0.5.2.mod

...i.com/oss/libraries/go/utilities/pathfinder/@v/v0.5.2.zip

...m/oss/libraries/go/utilities/pathfinder/@v/v0.5.2.ziphash

....com/oss/libraries/go/utilities/pathfinder/@v/v0.8.1.info

....com/oss/libraries/go/utilities/pathfinder/@v/v0.8.1.lock

...i.com/oss/libraries/go/utilities/pathfinder/@v/v0.8.1.mod

...i.com/oss/libraries/go/utilities/pathfinder/@v/v0.8.1.zip

...m/oss/libraries/go/utilities/pathfinder/@v/v0.8.1.ziphash

...state/go/pkg/mod/cache/download/gopkg.in/check.v1/@v/list

...pkg.in/check.v1/@v/v0.0.0-20161208181325-20d25e280405.mod

.../state/go/pkg/mod/cache/download/gopkg.in/yaml.v3/@v/list

...opkg.in/yaml.v3/@v/v3.0.0-20200313102051-9f266ea9e77c.mod

...go/pkg/mod/cache/download/gopkg.in/yaml.v3/@v/v3.0.1.info

...go/pkg/mod/cache/download/gopkg.in/yaml.v3/@v/v3.0.1.lock

.../go/pkg/mod/cache/download/gopkg.in/yaml.v3/@v/v3.0.1.mod

.../go/pkg/mod/cache/download/gopkg.in/yaml.v3/@v/v3.0.1.zip

...pkg/mod/cache/download/gopkg.in/yaml.v3/@v/v3.0.1.ziphash

....schukai.com/oss/libraries/go/utilities/pathfinder@v0.8.1

...ache/download/sumdb/sum.golang.org/tile/8/0/x076/690.p/73

...od/cache/download/sumdb/sum.golang.org/tile/8/1/299.p/146