Implement deploy command (with embedded files)

This is an alternative version of !46 (closed) where the .tf files are embedded in the binary using https://pkg.go.dev/embed

The files are written to the .runway subfolder relative to where runwayctl command was invoked.

An example of how the .runway folder ends up looking after a successful deploy invokation in a service's project:

model-evaluator (main*?) $ ls -a .runway
.                   .terraform          env-production.yml  runway.tf
..                  .terraform.lock.hcl env-staging.yml     runway.yml

Here runway.tf is the concatenation of all the files on reconciler/. This allows us to not have to worry about shipping .tf files with the binary, but does add files to the user's .runway folder. We could suggest to project maintainers to add the following to their .gitignore:

.runway/.terraform
.runway/.terraform.lock.hcl
.runway/runway.tf

Part of team#33 (closed)