docs: link the community as stacksjs.com/discord

Replaces every https://discord.gg/stacksjs link with the stacksjs.com/discord
vanity URL, which the stacksjs.com gateway now 301s to the invite. The invite
code lives in one place and can be rotated without touching the docs again.

Author: chrisbbreuer

README.md

@@ -264,7 +264,7 @@ For help, discussion about best practices, or any other conversation that would
 
 For casual chit-chat with others using this package:
 
-[Join the Stacks Discord Server](https://discord.gg/stacksjs)
+[Join the Stacks Discord Server](https://stacksjs.com/discord)
 
 ## Postcardware
 

docs/install.md

@@ -433,4 +433,4 @@ If the build fails:
 
 - [GitHub Issues](https://github.com/cwcss/crosswind/issues)
 - [Documentation](https://crosswind.sh)
-- [Discord Community](https://discord.gg/stacksjs)
+- [Discord Community](https://stacksjs.com/discord)

docs/intro.md

@@ -314,7 +314,7 @@ Now that you understand what Crosswind is and how it works, explore:
 ## Community & Support
 
 -**GitHub**- [github.com/cwcss/crosswind](https://github.com/cwcss/crosswind)
--**Discord**- [Join the Stacks Discord](https://discord.gg/stacksjs)
+-**Discord**- [Join the Stacks Discord](https://stacksjs.com/discord)
 -**Issues**- [Report bugs or request features](https://github.com/cwcss/crosswind/issues)
 -**Discussions**- [Ask questions and share ideas](https://github.com/cwcss/crosswind/discussions)