implemented aws.#Config and aws/cloudformation packages in stdlib

Signed-off-by: Sam Alba <sam.alba@gmail.com>

stdlib/aws/cloudformation/cloudformation.cue

@@ -0,0 +1,101 @@
+package cloudformation
+
+import (
+	"encoding/json"
+
+	"dagger.io/dagger"
+	"dagger.io/alpine"
+	"dagger.io/aws"
+)
+
+// AWS CloudFormation Stack
+#Stack: {
+
+	// AWS Config
+	config: aws.#Config
+
+	// Source is the Cloudformation template (JSON/YAML string)
+	source: string
+
+	// Stackname is the cloudformation stack
+	stackName: string
+
+	// Stack parameters
+	parameters: [string]: _
+
+	// Behavior when failure to create/update the Stack
+	onFailure: *"DO_NOTHING" | "ROLLBACK" | "DELETE"
+
+	// Timeout for waiting for the stack to be created/updated (in minutes)
+	timeout: *10 | uint
+
+	// Never update the stack if already exists
+	neverUpdate: *false | bool
+
+	#files: {
+		"/entrypoint.sh":     #Code
+		"/src/template.json": source
+		if len(parameters) > 0 {
+			"/src/parameters.json": json.Marshal(
+						[ for key, val in parameters {
+									ParameterKey:   "\(key)"
+									ParameterValue: "\(val)"
+								}])
+			"/src/parameters_overrides.json": json.Marshal([ for key, val in parameters {"\(key)=\(val)"}])
+		}
+	}
+
+	outputs: {
+		[string]: string
+
+		#dagger: compute: [
+		dagger.#Load & {
+			from: alpine.#Image & {
+				package: bash:      "=5.1.0-r0"
+				package: jq:        "=1.6-r1"
+				package: "aws-cli": "=1.18.177-r0"
+			}
+		},
+		dagger.#Mkdir & {
+			path: "/src"
+		},
+		for dest, content in #files {
+			dagger.#WriteFile & {
+				"dest":    dest
+				"content": content
+			}
+		},
+		dagger.#Exec & {
+			args: [
+				"/bin/bash",
+				"--noprofile",
+				"--norc",
+				"-eo",
+				"pipefail",
+				"/entrypoint.sh",
+			]
+			env: {
+				AWS_CONFIG_FILE:       "/cache/aws/config"
+				AWS_ACCESS_KEY_ID:     config.accessKey
+				AWS_SECRET_ACCESS_KEY: config.secretKey
+				AWS_DEFAULT_REGION:    config.region
+				AWS_REGION:            config.region
+				AWS_DEFAULT_OUTPUT:    "json"
+				AWS_PAGER:             ""
+				if neverUpdate {
+					NEVER_UPDATE: "true"
+				}
+				STACK_NAME: stackName
+				TIMEOUT:    "\(timeout)"
+				ON_FAILURE: onFailure
+			}
+			dir: "/src"
+			mount: "/cache/aws": "cache"
+		},
+		dagger.#Export & {
+			source: "/outputs.json"
+			format: "json"
+		},
+	]
+	}
+}