Create README.md for examples/

[sbhavani]

Description

Our examples are split between examples/ and docs/examples/. We also have features (e.g. inference) hidden in our examples that would be worth summarizing in a single README.

I'd also like to extend this to include third party examples (e.g. Hugging Face Accelerate) using TE.

Type of change

• [ x ] Documentation change (change only to the documentation, either a fix or a new content)
• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Infra/Build change
• [ ] Code refractor

Changes

Please list the changes introduced in this PR:

• Created a new README.md