feat(\db-tool\): introduce unified db-tool package with postgres harness and tests (T0-T8)

package/parse-uri/default.nix

@@ -0,0 +1,29 @@
+{ stdenv, gcc, libpq, lib, bash }:
+
+stdenv.mkDerivation {
+  pname = "parse-uri";
+  version = "1.0";
+
+  src = ./.;
+  doCheck = false;
+
+  nativeBuildInputs = [ gcc ];
+  buildInputs = [ libpq ];
+
+  INCLUDES = "-I${libpq.dev}/include";
+  LDFLAGS = "-L${libpq.out}/lib -lpq";
+
+  buildPhase = ''
+    ${bash}/bin/sh ./make.sh build
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp target/parse-uri $out/bin/
+  '';
+
+  meta = {
+    description = "parse-uri";
+    license = lib.licenses.mit;
+  };
+}