## Motivation
Users need to know what **prerequisites** they need in order to run exo.
Simple addition to docs prevents future raised issues.
## Changes
Updated ``README.md``:
- to include installation instructions for
**[uv](https://github.com/astral-sh/uv)** and
**[macmon](https://github.com/vladkens/macmon)**.
Updated ``CONTRIBUTING.md``:
- to verify these prerequisites are met before starting development.
- Standardized on brew installation instructions for macOS users to keep
the guide simple.
## Why It Works
By listing these prerequisites upfront, users will set up their
environment correctly before attempting to run exo.
## Test Plan
### Manual Testing
MacBook Pro M4
- Verified that ``uv`` and ``macmon`` were missing initially, causing
failures
- after installing them via brew (as documented), uv run exo starts
successfully.
### Automated Testing
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this change -->
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Co-authored-by: Evan Quiney <evanev7@gmail.com>
