Update of developer documentation on the Carbon website

[sstrubberg]

Some thoughts before we start converting these to tasks:

• We should segregate the community initiatives from the officially supported ones. E.g. Angular, Vue, etc shouldn't be on the same level as React and Web Components
• Web Components could use a primer to describe what they are, so folks that are both technical and non-technical can understand what they are.
• Some specific topics around React itself could be added. @tay1orjones mentioned things like server-side components, and our stance on that.
• With these items, something to consider is if there could be a better IA to support this content, perhaps can consider taking advantage of treeview navigation if it makes sense.
• Other topics we can potentially surface: feature flags, LTS, CVE mitigation/security support, etc