fix(rln): exclude large resource files from crate package (#394)

Exclude tree_depth_10/ resources and all .wasm files from the crates.io
package to bring the size under the 10MiB upload limit. The .wasm files
are unused by the rln crate (witness calculation uses graph.bin), and
tree_depth_10 resources are only needed for testing.

Package size: 22.8MiB → 8.5MiB (4.9MiB compressed).

Author: seemenkina

rln/Cargo.toml

@@ -7,6 +7,10 @@ description = "APIs to manage, compute and verify zkSNARK proofs and RLN primiti
 documentation = "https://github.com/vacp2p/zerokit"
 homepage = "https://vac.dev"
 repository = "https://github.com/vacp2p/zerokit"
+exclude = [
+    "resources/tree_depth_10/",
+    "resources/**/*.wasm",
+]
 
 [lib]
 crate-type = ["rlib", "staticlib", "cdylib"]

rln/README.md

@@ -121,6 +121,13 @@ and it's used to prevent a RLN ZK proof generated for one application to be re-u
   Accelerate proof generation by caching the infrequently-changing portion of the witness,
   so only the small message-specific remainder is computed on each proof.
 - **Pre-compiled Circuits**: Ready-to-use circuits with Merkle tree depth of 10 and 20.
+  > **Note:** The crates.io package only includes tree depth 20 resources
+  > (arkzkey and graph files) that are compiled into the binary at build time.
+  > Tree depth 10 resources and `.wasm` files are excluded from the package
+  > to stay within the crates.io size limit.
+  > If you need tree depth 10 or `.wasm` circuit files,
+  > download them from the
+  > [GitHub repository](https://github.com/vacp2p/zerokit/tree/master/rln/resources).
 - **Wasm Support**: WebAssembly bindings via rln-wasm crate with features like:
   - Browser and Node.js compatibility
   - Optional parallel feature support using