Add missing DESCRIPTION metadata across RPC methods

[Copilot]

Forest’s OpenRPC surface had many RpcMethod implementations without DESCRIPTION, which degraded generated API docs. This change fills that gap across the RPC method set, aligning with Lotus wording where possible.

• Description coverage

  • Added const DESCRIPTION: Option<&'static str> to all RpcMethod impls that were missing it in src/rpc/methods/*.
  • Includes core namespaces (chain, state, wallet, net, auth, sync, eth, msig, etc.) and Forest/F3-specific methods.

• Lotus alignment + fallback strategy

  • Reused Lotus OpenRPC summaries when available.
  • For methods without Lotus equivalents (Forest/F3/custom endpoints), added concise method-level descriptions using a consistent fallback pattern.

• OpenRPC output updates

  • Updated OpenRPC snapshots to reflect the now-populated description fields for methods in v0/v1/v2 specs.

implRpcMethod<2>forEthTraceReplayBlockTransactions{constNAME:&'staticstr = "Filecoin.EthTraceReplayBlockTransactions";constNAME_ALIAS:Option<&'staticstr> = Some("trace_replayBlockTransactions");constDESCRIPTION:Option<&'staticstr> = Some("Replays all transactions in a block returning the requested traces for each transaction.",);// ...}

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[LesnyRumcajs]

my expectations were low, yet I was still let down