Added StepFunctionsRestApi along with unit and integration testing. I…

…ntegration testing not tested yet.

Rebased branch with master.
closes aws#15081.

.github/ISSUE_TEMPLATE/bug.yml

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+name: Bug Report
+description: Report a bug
+title: "(module name): short issue description"
+labels: [bug, needs-triage]
+body:
+  - type: textarea
+    id: problem
+    attributes:
+      label: What is the problem?
+    validations:
+      required: true
+
+  - type: textarea
+    id: reproduction
+    attributes:
+      label: Reproduction Steps
+      description: |
+        Minimal amount of code that causes the bug (if possible) or a reference.
+
+        The code sample should be an SSCCE. See http://sscce.org/ for details.
+        In short, provide a code sample that we can copy/paste, run and reproduce.
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected
+    attributes:
+      label: What did you expect to happen?
+      description: |
+        What were you trying to achieve by performing the steps above?
+    validations:
+      required: true
+
+  - type: textarea
+    id: actual
+    attributes:
+      label: What actually happened?
+      description: |
+        What is the unexpected behavior you were seeing? If you got an error, paste it here.
+    validations:
+      required: true
+
+  - type: input
+    id: cdk-version
+    attributes:
+      label: CDK CLI Version
+      description: Output of `cdk version`
+    validations:
+      required: true
+
+  - type: input
+    id: framework-version
+    attributes:
+      label: Framework Version
+    validations:
+      required: false
+
+  - type: input
+    id: node-version
+    attributes:
+      label: Node.js Version
+    validations:
+      required: true
+
+  - type: input
+    id: operating-system
+    attributes:
+      label: OS
+    validations:
+      required: true
+
+  - type: dropdown
+    id: language
+    attributes:
+      label: Language
+      multiple: true
+      options:
+        - Typescript
+        - Python
+        - .NET
+        - Java
+        - Go
+    validations:
+      required: true
+
+  - type: input
+    id: language-version
+    attributes:
+      label: Language Version
+      description: E.g. TypeScript (3.8.3) | Java (8) | Python (3.7.3)
+    validations:
+      required: false
+
+  - type: textarea
+    id: other
+    attributes:
+      label: Other information
+      description: |
+        e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. associated pull-request, stackoverflow, slack, etc
+    validations:
+      required: false
+
+  - type: markdown
+    attributes:
+      value: |
+        ---
+
+        This is :bug: Bug Report

.github/ISSUE_TEMPLATE/doc.yml

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+name: Documentation Issue
+description: Issue in the reference documentation or developer guide
+title: "(module name): short issue description"
+labels: [feature-request, documentation, needs-triage]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Developer guide? Raise issue/pr here: https://github.com/awsdocs/aws-cdk-guide
+
+        Want to help? Submit a pull request here: https://github.com/aws/aws-cdk
+
+  - type: input
+    id: doc-link
+    attributes:
+      label: link to reference doc page
+    validations:
+      required: false
+
+  - type: textarea
+    id: issue
+    attributes:
+      label: Describe your issue?
+    validations:
+      required: true
+
+  - type: markdown
+    attributes:
+      value: |
+        ---
+
+        This is a 📕 documentation issue

.github/ISSUE_TEMPLATE/feature-request.yml

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+name: Feature Request
+description: Request a new feature
+title: "(module name): short issue description"
+labels: [feature-request, needs-triage]
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: Description
+      description: Short description of the feature you are proposing.
+    validations:
+      required: true
+
+  - type: textarea
+    id: use-case
+    attributes:
+      label: Use Case
+      description: |
+        Why do you need this feature?
+    validations:
+      required: true
+
+  - type: textarea
+    id: solution
+    attributes:
+      label: Proposed Solution
+      description: |
+        Please include prototype/workaround/sketch/reference implementation.
+    validations:
+      required: true
+
+  - type: textarea
+    id: other
+    attributes:
+      label: Other information
+      description: |
+        e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. associated pull-request, stackoverflow, slack, etc
+    validations:
+      required: false
+
+  - type: checkboxes
+    id: acknowledgments
+    attributes:
+      label: Acknowledge
+      options:
+        - label: I may be able to implement this feature request
+          required: false
+        - label: This feature might incur a breaking change
+          required: false
+
+  - type: markdown
+    attributes:
+      value: |
+        ---
+
+        This is a :rocket: Feature Request