Add READMEs to Serai and Monero

README.md

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+# Serai
+
+Serai is a new DEX, built from the ground up, initially planning on listing
+Bitcoin, Ethereum, Monero, DAI, and USDC, offering a liquidity pool trading
+experience. Funds are stored in an economically secured threshold multisig
+wallet.
+
+### Layout
+
+- `docs` - Documentation on the Serai protocol.
+
+- `coins` - Various coin libraries intended for usage in Serai yet also by the
+  wider community. This means they will always support the functionality Serai
+  needs, yet won't disadvantage other use cases when possible.
+
+- `crypto` - A series of composable cryptographic libraries built around the
+  `ff`/`group` APIs achieving a variety of tasks. These range from generic
+  infrastructure, to our IETF-compliant FROST implementation, to a DLEq proof as
+  needed for Bitcoin-Monero atomic swaps.
+
+- `processor` - A generic chain processor to process data for Serai and process
+  events from Serai, executing transactions as expected and needed.

coins/monero/README.md

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+# monero-serai
+
+A modern Monero transaction library intended for usage in wallets. It prides
+itself on accuracy, correctness, and removing common pit falls developers may
+face.
+
+Threshold multisignature support is available via the `multisig` feature.

crypto/dalek-ff-group/README.md

@@ -1,5 +1,6 @@
 # Dalek FF/Group
 
-ff/group bindings around curve25519-dalek with a random function based around a more modern rand_core.
+ff/group bindings around curve25519-dalek with a from_hash/random function based
+around modern dependencies.
 
 Some functions currently remain unimplemented.