feat(Enterprise Management): add service to project

[padamstx]

PR summary

This PR adds the Enterprise Management service to the project.

Fixes: n/a

PR Checklist

Please make sure that your PR fulfills the following requirements:

• The commit message follows the Angular Commit Message Guidelines.
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• New tests
• Build/CI related changes
• Documentation content changes
• Other (please describe)

What is the current behavior?

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information

[codecov]

Codecov Report

Merging #21 into master will increase coverage by 0.27%.
The diff coverage is 96.17%.

@@            Coverage Diff             @@
##           master      #21      +/-   ##
==========================================
+ Coverage   93.71%   93.98%   +0.27%     
==========================================
  Files           9       10       +1     
  Lines        5681     6387     +706     
==========================================
+ Hits         5324     6003     +679     
- Misses        357      384      +27     

Impacted Files	Coverage Δ
ibm_platform_services/enterprise_management_v1.py	96.17% <96.17%> (ø)
ibm_platform_services/__init__.py	100.00% <100.00%> (ø)

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[ibm-devx-automation]

🎉 This PR is included in version 0.6.0 🎉

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