docs: Fixing a typo in 03-installation.mdx and improving grammar in 2 other files for readability

apps/docs/docs/learn/02-thinking-in-stylex.mdx

@@ -50,7 +50,7 @@ Most existing solutions to this problem rely on rules and conventions.
   constraints on where and how styles can be applied, putting architectural limitations on styling.
 </details>
 
-StyleX aims to improve on both the consistency and predictability of styles
+StyleX aims to improve both the consistency and predictability of styles
 _and_ the expressive power available. We believe this is possible through
 build-tools.
 
@@ -181,8 +181,8 @@ At its core, StyleX can be boiled down to two functions:
 those styles to an element.
 
 Within these two functions, we choose to rely on common JS patterns rather than
-introduce unique API or patterns for StyleX. For example, we don't have an API for
-conditional styles. Instead we support applying styles conditionally with
+introduce unique APIs or patterns for StyleX. For example, we don't have an API for
+conditional styles. Instead, we support applying styles conditionally with
 boolean or ternary expressions.
 
 Things should work as expected when dealing with JavaScript objects and arrays.
@@ -248,7 +248,7 @@ type Props = {
 };
 ```
 
-Styles being typed enables extremely sophisticated rules about the ways in which
+Styles being typed enables extremely sophisticated rules about how
 a component's styles can be customized with **zero-runtime cost**.
 
 ### Shareable constants
@@ -294,11 +294,11 @@ distance":
 - `.className ~ *`
 - `.className:hover > div:first-child`
 
-All of these patterns, while powerful, makes styles fragile and less predictable.
+All of these patterns, while powerful, make styles fragile and less predictable.
 Applying class names on one element can affect a completely different element.
 
 Inheritable styles such as `color` will still be inherited, but that is the
-_only_ form of style-at-a-distance that StyleX allows. And in those cases too,
+_only_ form of style-at-a-distance that StyleX allows. In those cases too,
 the styles applied directly on an element always take precedence over inherited
 styles.
 

apps/docs/docs/learn/03-installation.mdx

@@ -66,7 +66,7 @@ done with any bundler that supports Babel, using the metadata generated by the
 StyleX plugin. See the API reference for more details on the
 `@stylexjs/babel-plugin` API.
 
-To make this easier for commonly used packagers and meta-frameworks, StyleX
+To make this easier for commonly used packages and meta-frameworks, StyleX
 provides plugins for Webpack, Rollup, and Next.js.
 
 <details>

apps/docs/docs/learn/index.mdx

@@ -9,7 +9,7 @@ title: Introduction
 
 # Introduction to StyleX
 
-StyleX is a simple, easy to use JavaScript syntax and compiler for styling web
+StyleX is a simple, easy-to-use JavaScript syntax and compiler for styling web
 apps.
 
 StyleX combines the strengths and avoids the weaknesses of both inline styles