Update links to IRC

The EsperNet webchat has been decommissioned, with no plans to
replace. KiwiIRC is the recommended replacement, but I'm not comfortable
using it as a drop-in replacement[^1], so I've rephrased this section to
make it more clear.

[^1]: There seems to be ongoing issues with TLS certificates
  (https://github.com/kiwiirc/kiwiirc/issues/1870), which meant it
  wasn't usable when I first tried.

README.md

@@ -26,8 +26,9 @@ developing the mod, [check out the instructions here](CONTRIBUTING.md#developing
 
 ## Community
 If you need help getting started with CC: Tweaked, want to show off your latest project, or just want to chat about
-ComputerCraft, do check out our [forum] and [GitHub discussions page][GitHub discussions]! There's also a fairly
-populated, albeit quiet [IRC channel][irc], if that's more your cup of tea.
+ComputerCraft, do check out our [GitHub discussions page][GitHub discussions]! There's also a fairly populated,
+albeit quiet IRC channel on [EsperNet], if that's more your cup of tea. You can join `#computercraft` through your
+desktop client, or online using [KiwiIRC].
 
 We also host fairly comprehensive documentation at [tweaked.cc](https://tweaked.cc/ "The CC: Tweaked website").
 
@@ -86,6 +87,6 @@ the generated documentation [can be browsed online](https://tweaked.cc/javadoc/)
 [modrinth]: https://modrinth.com/mod/gu7yAYhd "Download CC: Tweaked from Modrinth"
 [Minecraft Forge]: https://files.minecraftforge.net/ "Download Minecraft Forge."
 [Fabric]: https://fabricmc.net/use/installer/ "Download Fabric."
-[forum]: https://forums.computercraft.cc/
 [GitHub Discussions]: https://github.com/cc-tweaked/CC-Tweaked/discussions
-[IRC]: https://webchat.esper.net/?channels=computercraft "#computercraft on EsperNet"
+[EsperNet]: https://www.esper.net/
+[KiwiIRC]: https://kiwiirc.com/nextclient/#irc://irc.esper.net:+6697/#computercraft "#computercraft on EsperNet"

doc/guides/speaker_audio.md

@@ -191,7 +191,7 @@ end
 
 > [Confused?][!NOTE]
 > Don't worry if you don't understand this example. It's quite advanced, and does use some ideas that this guide doesn't
-> cover. That said, don't be afraid to ask on [GitHub Discussions] or [IRC] either!
+> cover. That said, don't be afraid to ask [the community for help][community].
 
 It's worth noting that the examples of audio processing we've mentioned here are about manipulating the _amplitude_ of
 the wave. If you wanted to modify the _frequency_ (for instance, shifting the pitch), things get rather more complex.
@@ -205,5 +205,4 @@ This is, I'm afraid, left as an exercise to the reader.
 [PCM]: https://en.wikipedia.org/wiki/Pulse-code_modulation "Pulse-code Modulation - Wikipedia"
 [Ring Buffer]: https://en.wikipedia.org/wiki/Circular_buffer "Circular buffer - Wikipedia"
 [Sine Wave]: https://en.wikipedia.org/wiki/Sine_wave "Sine wave - Wikipedia"
-[GitHub Discussions]: https://github.com/cc-tweaked/CC-Tweaked/discussions
-[IRC]: https://webchat.esper.net/?channels=computercraft "#computercraft on EsperNet"
+[Community]: /#community

doc/index.md

@@ -50,7 +50,11 @@ little daunting getting started. Thankfully, there's several fantastic tutorials
 Once you're a little more familiar with the mod, the sidebar and links below provide more detailed documentation on the
 various APIs and peripherals provided by the mod.
 
-If you get stuck, do [ask a question on GitHub][GitHub Discussions] or pop in to the ComputerCraft's [IRC channel][IRC].
+<h2 id="community">Community</h2>
+If you need help getting started with CC: Tweaked, want to show off your latest project, or just want to chat about
+ComputerCraft, do check out our [GitHub discussions page][GitHub discussions]! There's also a fairly populated,
+albeit quiet IRC channel on [EsperNet], if that's more your cup of tea. You can join `#computercraft` through your
+desktop client, or online using [KiwiIRC].
 
 ## Get Involved
 CC: Tweaked lives on [GitHub]. If you've got any ideas, feedback or bugs please do [create an issue][bug].
@@ -65,4 +69,5 @@ CC: Tweaked lives on [GitHub]. If you've got any ideas, feedback or bugs please
 [Fabric]: https://fabricmc.net/use/installer/ "Download Fabric."
 [lua]: https://www.lua.org/ "Lua's main website"
 [GitHub Discussions]: https://github.com/cc-tweaked/CC-Tweaked/discussions
-[IRC]: https://webchat.esper.net/?channels=computercraft "#computercraft on EsperNet"
+[EsperNet]: https://www.esper.net/
+[KiwiIRC]: https://kiwiirc.com/nextclient/#irc://irc.esper.net:+6697/#computercraft "#computercraft on EsperNet"

doc/mod-page.md

@@ -50,7 +50,11 @@ little daunting getting started. Thankfully, there's several fantastic tutorials
 Once you're a little more familiar with the mod, the [wiki](https://tweaked.cc/) provides more detailed documentation on the
 various APIs and peripherals provided by the mod.
 
-If you get stuck, do [ask a question on GitHub][GitHub Discussions] or pop in to the ComputerCraft's [IRC channel][IRC].
+## Community
+If you need help getting started with CC: Tweaked, want to show off your latest project, or just want to chat about
+ComputerCraft, do check out our [GitHub discussions page][GitHub discussions]! There's also a fairly populated,
+albeit quiet IRC channel on [EsperNet], if that's more your cup of tea. You can join `#computercraft` through your
+desktop client, or online using [KiwiIRC].
 
 ## Get Involved
 CC: Tweaked lives on [GitHub]. If you've got any ideas, feedback or bugs please do [create an issue][bug].
@@ -60,4 +64,5 @@ CC: Tweaked lives on [GitHub]. If you've got any ideas, feedback or bugs please
 [computercraft]: https://github.com/dan200/ComputerCraft "ComputerCraft on GitHub"
 [lua]: https://www.lua.org/ "Lua's main website"
 [GitHub Discussions]: https://github.com/cc-tweaked/CC-Tweaked/discussions
-[IRC]: http://webchat.esper.net/?channels=computercraft "#computercraft on EsperNet"
+[EsperNet]: https://www.esper.net/
+[KiwiIRC]: https://kiwiirc.com/nextclient/#irc://irc.esper.net:+6697/#computercraft "#computercraft on EsperNet"