docs: Add a docs folder on building, the code's structure, the search and trainingHEADv0.1.0master

Covers building and dependencies, the architecture and game loop, the board
representation, the Player and MinimaxPlayer traits, the minimax search,
the network and self-play training, benchmarking, and how to add a player.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/README.md b/README.md
index a9566c9..6fe11d6 100644
--- a/README.md
+++ b/README.md
@@ -92,5 +92,6 @@ cargo run --profile profiling -- bench [depth]
 
 `bench` searches six fixed positions to a fixed depth and prints each move, score and time. Add
 `--features search-stats` to also count nodes, cache hits and cutoffs. `plans.org` keeps a history
-of the optimisations and training experiments, with their results. `CLAUDE.md` describes the code's
-structure in more depth.
+of the optimisations and training experiments, with their results. [`docs/`](docs/README.md)
+explains how the search and training work, how the code is structured, how to build it, and how to
+add a new player.