Add plugin: ContactManager

[DFergo]

I am submitting a new Community Plugin

• I attest that I have done my best to deliver a high-quality plugin, am proud of the code I have written, and would recommend it to others. I commit to maintaining the plugin and being responsive to bug reports. If I am no longer able to maintain it, I will make reasonable efforts to find a successor maintainer or withdraw the plugin from the directory.

Repo URL

Link to my plugin: https://github.com/DFergo/obsidian-contact-manager

Release Checklist

• I have tested the plugin on
  • Windows
  • macOS
  • Linux
  • Android (if applicable)
  • iOS (if applicable)
• My GitHub release contains all required files (as individual files, not just in the source.zip / source.tar.gz)
  • main.js
  • manifest.json
  • styles.css (optional)
• GitHub release name matches the exact version number specified in my manifest.json (Note: Use the exact version number, don't include a prefix v)
• The id in my manifest.json matches the id in the community-plugins.json file.
• My README.md describes the plugin's purpose and provides clear usage instructions.
• I have read the developer policies at https://docs.obsidian.md/Developer+policies, and have assessed my plugin's adherence to these policies.
• I have read the tips in https://docs.obsidian.md/Plugins/Releasing/Plugin+guidelines and have self-reviewed my plugin to avoid these common pitfalls.
• I have added a license in the LICENSE file.
• My project respects and is compatible with the original license of any code from other plugins that I'm using.
  I have given proper attribution to these other projects in my README.md.