Add feature coverage matrix

[g-despot]

What's being changed:

In order to track the coverage of mission-critical Weaviate features throughout the documentation, a feature matrix is required that lists most of the available features and their corresponding resources (how-to guides, references, concepts, etc.).

Type of change:

• Documentation updates (non-breaking change to fix/update documentation)

How Has This Been Tested?

• GitHub action – automated build completed without errors
• Local build - the site works as expected when running yarn start

note, you can run yarn verify-links to test site links locally

[orca-security-eu]

Orca Security Scan Summary

Status	Check	Issues by priority
Passed	Infrastructure as Code	0   0   0   0	View in Orca
Passed	SAST	0   0   0   0	View in Orca
Passed	Secrets	0   0   0   0	View in Orca
Passed	Vulnerabilities	0   0   0   0	View in Orca

[weaviate-git-bot]

Great to see you again! Thanks for the contribution.

beep boop - the Weaviate bot 👋🤖

PS:
Are you already a member of the Weaviate Slack channel?