Add Prerequisites to Readme (#936)

## 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
<!-- Describe changes to automated tests, or how existing tests cover
this change -->
<!-- - -->

---------

Co-authored-by: Evan Quiney <evanev7@gmail.com>

CONTRIBUTING.md

@@ -5,10 +5,21 @@ Thank you for your interest in contributing to EXO!
 ## Getting Started
 
 To run EXO from source:
+
+**Prerequisites:**
+- [uv](https://github.com/astral-sh/uv) (for Python dependency management)
+  ```bash
+  brew install uv
+  ```
+- [macmon](https://github.com/vladkens/macmon) (for hardware monitoring on Apple Silicon)
+  ```bash
+  brew install macmon
+  ```
+
 ```bash
 git clone https://github.com/exo-explore/exo.git
 cd exo/dashboard
-npm install && npm run build
+npm install && npm run build && cd ..
 uv run exo
 ```
 

README.md

@@ -63,6 +63,16 @@ There are two ways to run exo:
 
 ### Run from Source (Mac & Linux)
 
+**Prerequisites:**
+- [uv](https://github.com/astral-sh/uv) (for Python dependency management)
+  ```bash
+  brew install uv
+  ```
+- [macmon](https://github.com/vladkens/macmon) (for hardware monitoring on Apple Silicon)
+  ```bash
+  brew install macmon
+  ```
+
 Clone the repo, build the dashboard, and run exo:
 
 ```bash

dashboard/package-lock.json

@@ -861,6 +861,7 @@
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 			"dev": true,
 			"license": "MIT",
+			"peer": true,
 			"dependencies": {
 				"@standard-schema/spec": "^1.0.0",
 				"@sveltejs/acorn-typescript": "^1.0.5",
@@ -900,6 +901,7 @@
 			"integrity": "sha512-Y1Cs7hhTc+a5E9Va/xwKlAJoariQyHY+5zBgCZg4PFWNYQ1nMN9sjK1zhw1gK69DuqVP++sht/1GZg1aRwmAXQ==",
 			"dev": true,
 			"license": "MIT",
+			"peer": true,
 			"dependencies": {
 				"@sveltejs/vite-plugin-svelte-inspector": "^4.0.1",
 				"debug": "^4.4.1",
@@ -1516,6 +1518,7 @@
 			"integrity": "sha512-LCCV0HdSZZZb34qifBsyWlUmok6W7ouER+oQIGBScS8EsZsQbrtFTUrDX4hOl+CS6p7cnNC4td+qrSVGSCTUfQ==",
 			"dev": true,
 			"license": "MIT",
+			"peer": true,
 			"dependencies": {
 				"undici-types": "~6.21.0"
 			}
@@ -1525,6 +1528,7 @@
 			"resolved": "https://registry.npmjs.org/acorn/-/acorn-8.15.0.tgz",
 			"integrity": "sha512-NZyJarBfL7nWwIq+FDL6Zp/yHEhePMNnnJ0y3qfieCrmNvYct8uvtiV41UvlSe6apAfk0fY1FbWx+NwfmpvtTg==",
 			"license": "MIT",
+			"peer": true,
 			"bin": {
 				"acorn": "bin/acorn"
 			},
@@ -1937,6 +1941,7 @@
 			"integrity": "sha512-fmTRWbNMmsmWq6xJV8D19U/gw/bwrHfNXxrIN+HfZgnzqTHp9jOmKMhsTUjXOJnZOdZY9Q28y4yebKzqDKlxlQ==",
 			"dev": true,
 			"license": "ISC",
+			"peer": true,
 			"engines": {
 				"node": ">=12"
 			}
@@ -2607,6 +2612,7 @@
 			"integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
 			"dev": true,
 			"license": "MIT",
+			"peer": true,
 			"engines": {
 				"node": ">=12"
 			},
@@ -2794,6 +2800,7 @@
 			"resolved": "https://registry.npmjs.org/svelte/-/svelte-5.45.3.tgz",
 			"integrity": "sha512-ngKXNhNvwPzF43QqEhDOue7TQTrG09em1sd4HBxVF0Wr2gopAmdEWan+rgbdgK4fhBtSOTJO8bYU4chUG7VXZQ==",
 			"license": "MIT",
+			"peer": true,
 			"dependencies": {
 				"@jridgewell/remapping": "^2.3.4",
 				"@jridgewell/sourcemap-codec": "^1.5.0",
@@ -2938,6 +2945,7 @@
 			"integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
 			"dev": true,
 			"license": "Apache-2.0",
+			"peer": true,
 			"bin": {
 				"tsc": "bin/tsc",
 				"tsserver": "bin/tsserver"
@@ -2959,6 +2967,7 @@
 			"integrity": "sha512-+Oxm7q9hDoLMyJOYfUYBuHQo+dkAloi33apOPP56pzj+vsdJDzr+j1NISE5pyaAuKL4A3UD34qd0lx5+kfKp2g==",
 			"dev": true,
 			"license": "MIT",
+			"peer": true,
 			"dependencies": {
 				"esbuild": "^0.25.0",
 				"fdir": "^6.4.4",