Add subscription cron

[sauterle]

Add Subscription (cron) and general structure for component subscription

[sauterle]

@HeavyWombat @Luke-Roy-IBM is it possible to integrate this feature?

[Luke-Roy-IBM]

@sauterle Thanks a lot for the Pull request I will look into this 👍

[Luke-Roy-IBM]

@sauterle Thanks for your pull request and your patience. Please address the changes and i will be able to update the Github action with Cron support

[Luke-Roy-IBM]

Please replace with following code in order to update existing subscription

Suggested change

	ibmcloud ce sub cron update --name ${{ inputs.name }} --destination-type ${{ inputs.destination-type }} --destination ${{ inputs.destination }} --path ${{ inputs.path }} --extension ${{ inputs.extension }} --schedule ${{ inputs.schedule }} --wait ${{ steps.set-resources.outputs.cpu }} ${{ steps.set-resources.outputs.memory }}
	ibmcloud ce sub cron update --name ${{ inputs.name }} --destination-type ${{ inputs.destination-type }} --destination ${{ inputs.destination }} --path ${{ inputs.path }} --extension ${{ inputs.extension }} --schedule "${{ inputs.schedule }}"

[Luke-Roy-IBM]

Please replace with the following in order to create a cron subscription

Suggested change

	ibmcloud ce sub cron create --name ${{ inputs.name }} --destination-type ${{ inputs.destination-type }} --destination ${{ inputs.destination }} --path ${{ inputs.path }} --extension ${{ inputs.extension }} --schedule ${{ inputs.schedule }} --wait ${{ steps.set-resources.outputs.cpu }} ${{ steps.set-resources.outputs.memory }}
	ibmcloud ce sub cron create --name ${{ inputs.name }} --destination-type ${{ inputs.destination-type }} --destination ${{ inputs.destination }} --path ${{ inputs.path }} --extension ${{ inputs.extension }} --schedule "${{ inputs.schedule }}" --wait

[Luke-Roy-IBM]

Suggested change

	*Deploy a Cron Subscription: `deploy-cron-sub.yml`*: Deploy your Cron Subscription to `Default` resource-group in `eu-de` to the project `MY-PROJECT` with its source code in the root of the repository the name of the job is`my-cron-sub`.
	*Deploy a Cron Subscription: `deploy-cron-sub.yml`*: Deploy your Cron Subscription to `Default` resource-group in `eu-de` to the project `MY-PROJECT` with its source code in the root of the repository the name of the job is`cron-app`. See the docs for more infromation https://cloud.ibm.com/docs/codeengine?topic=codeengine-subscribe-cron-tutorial.

[Luke-Roy-IBM]

Please update docs as this is the way it was tested

Suggested change

	api-key: ${{ secrets.IBM_IAM_API_KEY }}
	resource-group: 'Default'
	region: 'eu-de'
	project: 'MY-PROJECT'
	component: 'sub'
	subscription-type: 'cron'
	destination-type: 'app'
	destination: 'my-app'
	path: '/events'
	extension: 'extA=A'
	schedule: '*/2 * * * *'
	name: 'my-cron-sub'
	build-source: './'
	cpu: 1
	memory: 4G
	api-key: ${{ secrets.IBM_IAM_API_KEY }}
	resource-group: 'Default'
	region: 'eu-de'
	project: 'MY-PROJECT'
	component: 'sub'
	subscription-type: 'cron'
	destination-type: 'app'
	destination: 'cron-app'
	path: '/events'
	extension: 'extA=A'
	schedule: '*/2 * * * *'
	name: 'cron-sub'