Add example manifests

[ulucinar]

Description of your changes

In the context of: crossplane/terrajet#48

Adds generated example manifests for the Terraform resources.

I have:

• Read and followed Crossplane's contribution process.
• Run make reviewable test to ensure this PR is ready for review.

How has this code been tested

An example generated manifest:

# This example manifest is auto-generated, and has not been tested.
# Please make the necessary adjustments before using it.
#apiVersion: compute.gcp.jet.crossplane.io/v1alpha2
#kind: Instance
#metadata:
#  name: example
#spec:
#  forProvider:
#    bootDisk:
#    - initializeParams:
#      - image: debian-cloud/debian-9
#    machineType: e2-medium
#    metadata:
#      foo: bar
#    metadataStartupScript: echo hi > /test.txt
#    networkInterface:
#    - accessConfig:
#      - {}
#      networkRef:
#        name: example
#    scratchDisk:
#    - interface: SCSI
#    serviceAccount:
#    - email: ${google_service_account.default.email}
#      scopes:
#      - cloud-platform
#    tags:
#    - foo
#    - bar
#    zone: us-central1-a
#  providerConfigRef:
#    name: example

Corresponding Terraform registry example:

resource "google_compute_instance" "default" {
  name         = "test"
  machine_type = "e2-medium"
  zone         = "us-central1-a"

  tags = ["foo", "bar"]

  boot_disk {
    initialize_params {
      image = "debian-cloud/debian-9"
    }
  }

  // Local SSD disk
  scratch_disk {
    interface = "SCSI"
  }

  network_interface {
    network = "default"

    access_config {
      // Ephemeral public IP
    }
  }

  metadata = {
    foo = "bar"
  }

  metadata_startup_script = "echo hi > /test.txt"

  service_account {
    # Google recommends custom service accounts that have cloud-platform scope and permissions granted via IAM Roles.
    email  = google_service_account.default.email
    scopes = ["cloud-platform"]
  }
}

[turkenh]

Thanks @ulucinar!
It is great to have generated examples for all resources 👍

Apart from the comment that I've added for using acronyms, I would like us to consider putting them in generated folder under examples, instead of examples-generated at the repo root.

[ulucinar]

Thanks @ulucinar! It is great to have generated examples for all resources 👍

Apart from the comment that I've added for using acronyms, I would like us to consider putting them in generated folder under examples, instead of examples-generated at the repo root.

Thank you @turkenh. I've moved the generated examples under to examples/generated as you suggested. All lines are also commented out as suggested here.

[turkenh]

Thanks @ulucinar!
I personally wouldn't prefer to comment out all yaml given it is already mentioned to be generated and needs to be tweaked, but not a blocker.

[ulucinar]

Thanks @turkenh!