Guide users to recommended ways of viewing minecraft sources

[TelepathicGrunt]

It is a common question from new users for how to view Minecraft sources. It would be nice to have a page that helps new modders know to use the tools of their IDE and where the mc source library itself is.

• Where in External Library the MC sources all all
• Mention that IDEs have global search tools and link to those IDE docs.
• Mention IDEs generally have a way to ctrl click on something to see their sources, link to IDE docs for this.

From there, the modders can learn more about their IDE which they can explore the IDE docs themselves for more stuff. We also then help them know what the recommended ways of viewing mc sources are (not trying to decompile mc source files from prod or something lol)

[tmvkrpxl0]

Neogradle does output unpacked, decompiled Minecraft source. Perhaps should we include that for niche IDE users? I figured some wouldn't have java decompiler.