Add Obsidian toolkit

[EricGustin]

Add community toolkits "Obsidian" and "Memory"

Toolkit Checklist

• The toolkit is published to PyPI
• The toolkit source code is hosted in a publicly accessible repository on a supported version control platform (e.g., GitHub, GitLab, etc.)
• The toolkit is licensed under an open source license

PR Checklist

• I have determined the appropriate category for the toolkit, e.g., productivity, social-communication, entertainment, development, automation, etc.
• I create a new file located at pages/toolkits/<category>/my-toolkit-name.mdx that uses the Community Toolkit Template
• I have added the toolkit to the pages/toolkits/<category>/_meta.ts file
• I have added the toolkit to the src/components/custom/Toolkits/toolkits-config.ts file. For the toolkit's image,
  • I am using the default image public/images/icons/community-contributed.png OR
  • I am using an image that is smaller than 5 KB that I have added at public/images/icons/<image-name>.png