Replace NINA links with archive.org links (#144)

* Update README.md

* Update CLIENT.md

* Update AIM_6_7.md

README.md

@@ -187,7 +187,7 @@ curl http://localhost:8080/chat/room/public
 ## 🔗 Acknowledgements
 
 - [aim-oscar-server](https://github.com/ox/aim-oscar-server) is another cool open source AIM server project.
-- [NINA Wiki](https://wiki.nina.chat/wiki/Main_Page) is an indispensable source for figuring out the OSCAR API.
+- [NINA Wiki](https://web.archive.org/web/20250910233011/https://wiki.nina.chat/wiki/Main_Page) is an indispensable source for figuring out the OSCAR API.
 - [libpurple](https://developer.pidgin.im/wiki/WhatIsLibpurple) is also an invaluable OSCAR reference (especially
   version [2.10.6-1](https://github.com/Tasssadar/libpurple)).
 

docs/AIM_6_7.md

@@ -16,7 +16,7 @@ Installation guides are available for the following versions:
 ### Installation
 
 1. Download AIM 6.x (recommended **AIM 6.1.46.1**) from
-   the [NINA wiki](https://wiki.nina.chat/wiki/Clients/AOL_Instant_Messenger#Windows).
+   the [NINA wiki](https://web.archive.org/web/20250910233232/https://wiki.nina.chat/wiki/Clients/AOL_Instant_Messenger#Windows).
 2. Run the installer and complete the installation.
 3. Close the AIM application.
 4. Open **Task Manager** and end the **AIM (32 bit)** process if it's still running.
@@ -74,7 +74,7 @@ To point the client to your Retro AIM Server:
 ### Installation
 
 1. Download an AIM 6.x or 7.x client (recommended **6.9.17.2** or **7.5.8.2**) from the  
-   [NINA wiki](https://wiki.nina.chat/wiki/Clients/AOL_Instant_Messenger#Windows).
+   [NINA wiki](https://web.archive.org/web/20250910233232/https://wiki.nina.chat/wiki/Clients/AOL_Instant_Messenger#Windows).
 2. Run the installer and complete the installation.
 3. Close the AIM application.
 4. Open **Task Manager** and end the **AIM (32 bit)** process if it's still running.

docs/CLIENT.md

@@ -26,7 +26,7 @@ Get started with the [AIM for macOS project](https://github.com/mk6i/aim-for-mac
 
 ### Windows 10/11
 
-1. Download AIM 5.9.6089 (available on [NINA wiki](https://wiki.nina.chat/wiki/Clients/AOL_Instant_Messenger#Windows)).
+1. Download AIM 5.9.6089 (available on [NINA wiki](https://web.archive.org/web/20250910233232/https://wiki.nina.chat/wiki/Clients/AOL_Instant_Messenger#Windows)).
 2. Install AIM and exit out of the application post-installation.
 3. Open **Task Manager** and kill the **AOL Instant Messenger (32 bit)** process to make sure the application is
    actually terminated.