website/docs: Write missing doc pages

[adamschmideg]

• [x] light client overview (@adamschmideg)
• [x] geth system requirements
• [x] command line options (@fjl)
• [x] puppeth
• [x] config file (@ChrisChinchilla)
• [x] ethclient
• [x] Go API
• [x] Geth architecture overview (consensus engine, etc)
• [x] sync modes (@ChrisChinchilla)
• [x] graphql
• [x] clef ui
• [x] hardware requirements
• [ ] goevmlab / traceview
• [x] caching (gcmode, flushing tries after timeout etc.)
• [x] update FAQ page re fast sync being dropped and common snap sync issues
• [x] individual built-in tracers (e.g. prestateTracer, unigramTracer etc.)
• [x] other built-in commands like devp2p, abigen, etc.
• [x] more in-depth cli cmd description: e.g. how to prune your node

[MariusVanDerWijden]

Please don't ask if you can work on this, just pick a topic that you want to write about and send a pr if you think you have appropriately captured the topic.

[vj-codes]

@ligi @adamschmideg @MariusVanDerWijden @s1na @jmcook1186 @Zachinquarantine what branch should I push the code to? TIA

[jmcook1186]

if you are adding docs please raise a PR to the gh-pages branch.

[holiman]

goevmlab / traceview should not have a doc-section in the go-ethereum repo, it is a standalone repo. Looks like we can (almost?) close this ticket?

[jmcook1186]

i think it would be good to also add a page on config files. At the moment they are only mentioned in the "connecting to the network" page. I'll do this asap and then I agree this can be closed out.