feat(pkgs): add flamelens

pkgs/default.nix

@@ -10,6 +10,7 @@
   circom-lsp = pkgs.callPackage ./circom-lsp { };
   envsub = pkgs.callPackage ./envsub { };
   fennel-language-server = pkgs.callPackage ./fennel-language-server { };
+  flamelens = pkgs.callPackage ./flamelens { };
   parinfer-rust = pkgs.callPackage ./parinfer-rust { };
   pest-ide-tools = pkgs.callPackage ./pest-ide-tools { };
   # FIXME: only buildable on darwin

pkgs/flamelens/default.nix

@@ -0,0 +1,30 @@
+{ lib, fetchFromGitHub, rustPlatform }:
+
+rustPlatform.buildRustPackage rec {
+  pname = "flamelens";
+  version = "v0.2.0";
+
+  src = fetchFromGitHub {
+    owner = "YS-L";
+    repo = pname;
+    rev = version;
+    hash = "sha256-v8SBd5KkGok4hmAwSKmnKgxq3Ghipho7W7UYHW/2EMg=";
+  };
+
+  cargoSha256 = "sha256-0OG0q6GTF7nvVWAwvJZ0lEri0rz42zN4xvT0VGp3n/I=";
+
+  nativeBuildInputs = [
+  ];
+
+  buildInputs = [
+  ];
+
+  doCheck = false;
+
+  meta = with lib; {
+    description = "Flamegraph viewer in the terminal ";
+    homepage = "https://github.com/YS-L/flamelens";
+    license = licenses.mit;
+    maintainers = with maintainers; [ reo101 ];
+  };
+}