shells: Add silverfin-tpi shell

shells/silverfin-tpi.nix

@@ -0,0 +1,43 @@
+{ lib, pkgs, inputs, ... }:
+pkgs.devshell.mkShell {
+  name = "Silverfin";
+  imports = [ "${inputs.devshell}/extra/language/ruby.nix" ];
+  devshell.startup = {
+    "link-devshell-dir".text = ''
+      ln -snf $DEVSHELL_DIR $PRJ_DATA_DIR/devshell
+    '';
+  };
+  packages = with pkgs; [
+    cmake
+    nodejs_18
+    shared-mime-info
+    yarn
+  ];
+  env = [
+    {
+      name = "LIBRARY_PATH";
+      eval = "$LD_LIBRARY_PATH";
+    }
+    {
+      name = "POSTGRESQL_ADDRESS";
+      value = "localhost";
+    }
+    {
+      name = "POSTGRESQL_USERNAME";
+      value = "silverfin";
+    }
+    {
+      name = "POSTGRESQL_PASSWORD";
+      value = "silverfin";
+    }
+  ];
+  language.c.compiler = lib.mkForce pkgs.clang;
+  language.ruby = {
+    package = pkgs.ruby_3_2;
+    nativeDeps = with pkgs; [
+      postgresql
+      libffi
+      zlib
+    ];
+  };
+}