message: docs: add to AnchorMode doc comment
diff: @@ -39,7 +39,15 @@ enum PayloadType {
  }
  /**
  - * How a transaction gets appended to the Stacks blockchain
  + * How a transaction should get appended to the Stacks blockchain.
  + *
  + * In the Stacks blockchain, there are two kinds of blocks: anchored
  + * blocks and streaming microblocks. A transactions AnchorMode specifies
  + * which kind of block it should be included in.
  + *
  + * For more information about the kinds of Stacks blocks and the various
  + * AnchorModes, check out {@link https://github.com/stacksgov/sips/blob/main/sips/sip-001/sip-001-burn-election.md SIP 001} and
  + * {@link https://github.com/stacksgov/sips/blob/main/sips/sip-005/sip-005-blocks-and-transactions.md SIP 005}
  */
  enum AnchorMode {
  /** The transaction MUST be included in an anchored block */
  