feat(ci): Add deny config

This includes a non exclusive list of license we allow in this project
due to license compatibility.

deny.toml

@@ -0,0 +1,64 @@
+[graph]
+targets = []
+all-features = false
+no-default-features = false
+
+[output]
+feature-depth = 1
+
+[advisories]
+ignore = []
+
+[licenses]
+allow = [
+    "MIT",
+    "ISC",
+    "Apache-2.0",
+    "Apache-2.0 WITH LLVM-exception",
+    "Unicode-DFS-2016",
+    "Unlicense",
+    "BSD-3-Clause",
+    "Zlib",
+    "OpenSSL",
+]
+
+confidence-threshold = 0.8
+
+exceptions = []
+
+# Do not warn for allowed licenses that are not used.
+unused-allowed-license = "allow"
+
+[[licenses.clarify]]
+crate = "ring"
+expression = "MIT AND ISC AND OpenSSL"
+license-files = [
+    { path = "LICENSE", hash = 0xbd0eed23 }
+]
+
+[licenses.private]
+ignore = false
+registries = [
+]
+
+[bans]
+multiple-versions = "warn"
+wildcards = "allow"
+highlight = "all"
+workspace-default-features = "allow"
+external-default-features = "allow"
+allow = []
+deny = []
+skip = []
+skip-tree = []
+
+[sources]
+unknown-registry = "warn"
+unknown-git = "warn"
+allow-registry = ["https://github.com/rust-lang/crates.io-index"]
+allow-git = []
+
+[sources.allow-org]
+github = [""]
+gitlab = [""]
+bitbucket = [""]