docs: add descriptions to devShells

devShells/flake/default.nix

@@ -43,4 +43,8 @@ mkShell {
       '';
     })
   ];
+
+  meta.description = ''
+    Shell providing some utility scripts concerning the main flake.
+  '';
 }

devShells/neovim-shells/default.nix

@@ -5,9 +5,15 @@
 }: let
   inherit (pkgs.lib) listToAttrs nameValuePair;
   mkLangsShells = langs:
-    listToAttrs (map (l:
-      nameValuePair l (pkgs.callPackage "${self}/homeManagerModules/neovim/langs/${l}/shell.nix" {inherit self;}))
-    langs);
+    listToAttrs (map (
+        l:
+          nameValuePair
+          l
+          ((pkgs.callPackage "${self}/homeManagerModules/neovim/langs/${l}/shell.nix" {inherit self;}).overrideAttrs (o: {
+            meta.description = "${l} shell to be loaded by my Neovim config dynamically.";
+          }))
+      )
+      langs);
 in
   mkLangsShells [
     "csharp"

devShells/netdaemon/default.nix

@@ -7,4 +7,8 @@ mkShell {
   packages = [
     dotnetCorePackages.sdk_9_0
   ];
+
+  meta.description = ''
+    Shell that makes sure we have the right dotnet-sdk version for NetDaemon development.
+  '';
 }

devShells/node/default.nix

@@ -11,4 +11,8 @@ mkShell {
     nodejs_latest
     typescript
   ];
+
+  meta.description = ''
+    Shell that provides `bumpNpmDeps`, node and typescript.
+  '';
 }

devShells/subtitle-dev/default.nix

@@ -16,4 +16,8 @@ mkShell {
 
     bumpNpmDeps
   ];
+
+  meta.description = ''
+    Shell that provides the dependencies for my subtitle management scripts.
+  '';
 }