Implement client with Angular's HttpClient

[ccremer]

• Implements the Angular client using Angular's HttpClient instead of the default fetch implementation
• Adds an Interceptor class that applies the token to the request headers

Checklist for PR Authors

• Link this PR to related issues if applicable
• This PR contains a single logical change (to build a better changelog)
• I have cleaned up the commit history (no useless army of tiny "Update file xyz" commits)
• PR title doesn't contain a categorization prefix like "[chore]" or "feat:" -> There are labels for that

Checklist for PR Reviewers

• Categorize the PR by setting a good title and adding one of the release labels (see below)

  Labels that control the release

  • major: major
  • minor: minor
  • patch: patch
  • performance: patch
  • skip-release: none
  • release: Release after merge. Use together with a Label that doesn't immediately release, e.g. internal.
  • internal: none
  • documentation: none
  • tests: none
  • dependencies: none

📦 Published PR as canary version: Canary Versions

✨ Test out this PR locally via:

npm install @ccremer/kubernetes-client-angular@0.4.0-canary.47.a27aa87.0
npm install @ccremer/kubernetes-client@0.4.0-canary.47.a27aa87.0
# or 
yarn add @ccremer/kubernetes-client-angular@0.4.0-canary.47.a27aa87.0
yarn add @ccremer/kubernetes-client@0.4.0-canary.47.a27aa87.0