feat: adding finops-weekly community

[smartcloudscode]

Add a Slack Group

• Suggestion is not a duplicate
• Suggestion is placed in the proper country according the slack channel’s demographic or if it’s a general channel, it’s placed in the appropriate category
• Name and link are accurate
• Brief description of the channel is accurate and properly typed

Remove a Slack Group

• Name of Slack group is present
• Reason for requesting removal is present