feat(config): fish configs

config/fish/functions/_tide_remove_unusable_items.fish

@@ -0,0 +1,25 @@
+function _tide_remove_unusable_items
+    # Remove tool-specific items for tools the machine doesn't have installed
+    set -l removed_items
+    for item in aws crystal direnv distrobox docker elixir gcloud git go java kubectl nix_shell node php pulumi python ruby rustc terraform toolbox zig
+        contains $item $tide_left_prompt_items $tide_right_prompt_items || continue
+
+        set -l cli_names $item
+        switch $item
+            case distrobox # there is no 'distrobox' command inside the container
+                set cli_names distrobox-export # 'distrobox-export' and 'distrobox-host-exec' are available
+            case nix_shell
+                set cli_names nix nix-shell
+            case python
+                set cli_names python python3
+        end
+        type --query $cli_names || set -a removed_items $item
+    end
+
+    set -U _tide_left_items (for item in $tide_left_prompt_items
+        contains $item $removed_items || echo $item
+    end)
+    set -U _tide_right_items (for item in $tide_right_prompt_items
+        contains $item $removed_items || echo $item
+    end)
+end