init plugins

Cargo.toml

@@ -78,11 +78,16 @@ tantivy = "0.26.1"
 zip = { version = "8.6.0", default-features = false, features = ["deflate"] }
 pdf-extract = "0.10.0"
 nom-exif = "3.6.1"
+extism = { version = "1.30.0", optional = true }
+toml = { version = "1.1.2", optional = true }
 
 [features]
 default = []
 test_utils = ["mockall"]
 integration_tests = []
+# WASM plugin runtime (Extism). Opt-in: bundles wasmtime, a large engine most
+# deployments won't use. Activation also requires OXICLOUD_ENABLE_PLUGINS=true.
+plugins = ["dep:extism", "dep:toml"]
 
 [lints.rust]
 unexpected_cfgs = { level = "warn", check-cfg = ['cfg(integration_tests)'] }