Copy updates for installation page

Author: Conor Okus

docs/building-a-node-with-ldk/installation.md

@@ -4,13 +4,9 @@ Welcome to the Lightning Development Kit documentation!
 
 If you have any questions about anything related to LDK, feel free to ask our community on [GitHub Discussions](https://github.com/orgs/lightningdevkit/discussions) or join us on [Discord](https://discord.gg/xaYE3pDQpm).
 
-## System Requirements
-
-MacOS, Windows and Linux are supported.
-
 ## Installation
 
-To add LDK to a project, run:
+Add LDK to a project by configuring the respective config files:
 
 <CodeSwitcher :languages="{rust:'Rust', kotlin:'Kotlin'}">
   <template v-slot:rust>
@@ -81,5 +77,8 @@ import org.ldk.structs.FeeEstimator
 </CodeSwitcher>
 
 ::: tip Installing LDK Swift
-Import LDK through the Swift package manager.
+Add ldk-swift package using the Swift Package Manager.
+
+To import the package, use: `import LightningDevKit`
+
 :::