feat: add dasht for local api doc search

nix/base-system/flake.nix

@@ -205,6 +205,7 @@ EOF";
                 vim-dadbod
                 vim-dadbod-ui
                 vim-dadbod-completion
+                vim-dasht
               ]) ++ [ possession-nvim harpoon-nvim d2-vim neogit-nvim ];
             };
           };
@@ -218,6 +219,7 @@ EOF";
             nil-pkg
 			lua-language-server
             rust-analyzer
+            dasht
             # TODO(jwall): This is no longer provided for darwin in nixpkgs
             #dbeaver-bin
         ]);