Verify plugin signatures

Cargo.lock

@@ -1816,6 +1816,7 @@ dependencies = [
  "cfg-if",
  "cpufeatures",
  "curve25519-dalek-derive",
+ "digest",
  "fiat-crypto",
  "rustc_version",
  "subtle",
@@ -2186,6 +2187,30 @@ dependencies = [
  "spki",
 ]
 
+[[package]]
+name = "ed25519"
+version = "2.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "115531babc129696a58c64a4fef0a8bf9e9698629fb97e9e40767d235cfbcd53"
+dependencies = [
+ "pkcs8",
+ "signature",
+]
+
+[[package]]
+name = "ed25519-dalek"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70e796c081cee67dc755e1a36a0a172b897fab85fc3f6bc48307991f64e4eca9"
+dependencies = [
+ "curve25519-dalek",
+ "ed25519",
+ "serde",
+ "sha2",
+ "subtle",
+ "zeroize",
+]
+
 [[package]]
 name = "either"
 version = "1.15.0"
@@ -2218,6 +2243,7 @@ name = "ely_app"
 version = "0.1.0"
 dependencies = [
  "directories",
+ "ed25519-dalek",
  "ely_browser_core",
  "ely_design_system",
  "ely_domain",