Make a separate key features page

[MrPowers]

We currently have a key features section on the homepage that highlights some of the nice Delta Lake features:

Perhaps we should create a delta.io/key-features pages with an exhaustive list of all the key features. It'd be nice if each key feature section linked to a blog post explaining the key feature in detail. The time travel key feature section could link to this blog post for example.

It'd be nice to have a page that clearly outlines all the reasons why the viewer should be seriously considering using Delta Lake.

[MrPowers]

Here's a prioritized list of the key features:

• ACID transactions
• File skipping
• Z Ordering
• Delete rows
• Schema enforcement
• Schema evolution
• Safe partition management commands
• Rollback to prior versions with restore
• Time travel
• Multi-engine support
• Merge command
• Change data feed
• Append-only tables
• Generated columns
• Fast DML with deletion vectors
• Table features
• Constraints and checks
• Small file compaction with optimize
• Vacuum to remove stale files from storage
• Faster aggregations based on metadata
• Easy to use without Spark

[MrPowers]