nushellPlugins.*: set pnames correctly

Because otherwise:
- The names are inconsistent with the other nushell plugins
- `versionCheckHook` cannot find the binaries without setting a special
  variable

pkgs/shells/nushell/plugins/formats.nix

@@ -8,7 +8,7 @@
 }:
 
 rustPlatform.buildRustPackage (finalAttrs: {
-  pname = "nushell_plugin_formats";
+  pname = "nu_plugin_formats";
   inherit (nushell) version src cargoHash;
 
   nativeBuildInputs = [ pkg-config ] ++ lib.optionals stdenv.cc.isClang [ rustPlatform.bindgenHook ];

pkgs/shells/nushell/plugins/gstat.nix

@@ -9,7 +9,7 @@
 }:
 
 rustPlatform.buildRustPackage (finalAttrs: {
-  pname = "nushell_plugin_gstat";
+  pname = "nu_plugin_gstat";
   inherit (nushell) version src cargoHash;
 
   nativeBuildInputs = [ pkg-config ] ++ lib.optionals stdenv.cc.isClang [ rustPlatform.bindgenHook ];

pkgs/shells/nushell/plugins/hcl.nix

@@ -8,7 +8,7 @@
 }:
 
 rustPlatform.buildRustPackage (finalAttrs: {
-  pname = "nushell_plugin_hcl";
+  pname = "nu_plugin_hcl";
   version = "0.105.1";
 
   src = fetchFromGitHub {

pkgs/shells/nushell/plugins/highlight.nix

@@ -8,7 +8,7 @@
 }:
 
 rustPlatform.buildRustPackage (finalAttrs: {
-  pname = "nushell_plugin_highlight";
+  pname = "nu_plugin_highlight";
   version = "1.4.7+0.105.1";
 
   src = fetchFromGitHub {

pkgs/shells/nushell/plugins/net.nix

@@ -7,7 +7,7 @@
 }:
 
 rustPlatform.buildRustPackage (finalAttrs: {
-  pname = "nushell_plugin_net";
+  pname = "nu_plugin_net";
   version = "1.10.0";
 
   src = fetchFromGitHub {

pkgs/shells/nushell/plugins/polars.nix

@@ -9,7 +9,7 @@
 }:
 
 rustPlatform.buildRustPackage (finalAttrs: {
-  pname = "nushell_plugin_polars";
+  pname = "nu_plugin_polars";
   inherit (nushell) version src cargoHash;
 
   nativeBuildInputs = [ pkg-config ] ++ lib.optionals stdenv.cc.isClang [ rustPlatform.bindgenHook ];

pkgs/shells/nushell/plugins/query.nix

@@ -10,7 +10,7 @@
 }:
 
 rustPlatform.buildRustPackage (finalAttrs: {
-  pname = "nushell_plugin_query";
+  pname = "nu_plugin_query";
   inherit (nushell) version src cargoHash;
 
   nativeBuildInputs = [ pkg-config ] ++ lib.optionals stdenv.cc.isClang [ rustPlatform.bindgenHook ];

pkgs/shells/nushell/plugins/units.nix

@@ -8,7 +8,7 @@
 }:
 
 rustPlatform.buildRustPackage (finalAttrs: {
-  pname = "nushell_plugin_units";
+  pname = "nu_plugin_units";
   version = "0.1.6";
 
   src = fetchFromGitHub {