feat(functions): adds a function for generating .gitignore patterns

command: gi

This tool generates .gitignore patterns for specified languages.

functions/gi.fish

@@ -0,0 +1,54 @@
+function gi --description "Generate .gitignore files using the gitignore.io API"
+    # Define the flags
+    argparse h/help d/description l/list -- $argv
+    or return 1
+
+    # Help output
+    if set -q _flag_help
+        echo "Usage: gi [TARGETS...] [FLAGS]"
+        echo ""
+        echo "Arguments:"
+        echo "  TARGETS       Comma-separated list of languages or tools (e.g., c++,neovim,archlinux)"
+        echo ""
+        echo "Flags:"
+        echo "  -h, --help        Show this help message"
+        echo "  -d, --description Show the Fish function description"
+        echo "  -l, --list        List all supported targets from the API"
+        echo ""
+        echo "Examples:"
+        echo "  gi c++                  # Print C++ gitignore to stdout"
+        echo "  gi python,venv > .gitignore # Create a file for Python and venv"
+        echo "  gi -l | grep -i linux   # Search for specific OS support"
+        return 0
+    end
+
+    # Print the function description
+    if set -q _flag_description
+        functions -D gi
+        return 0
+    end
+
+    # Handle the list flag
+    if set -q _flag_list
+        curl -sL https://www.toptal.com/developers/gitignore/api/list
+        return 0
+    end
+
+    # Error if no arguments provided
+    if not set -q argv[1]
+        echo "Error: No targets provided. Use 'gi --help' for usage." >&2
+        return 1
+    end
+
+    # Execute the API call
+    # We replace any spaces with commas just in case you pass them as separate args
+    set -l targets (string join "," $argv)
+
+    echo "## Generating .gitignore for: $targets"
+    curl -f -sL "https://www.toptal.com/developers/gitignore/api/$targets"
+
+    if test $status -ne 0
+        echo "Error: Failed to fetch gitignore. Are the targets spelled correctly?" >&2
+        return 1
+    end
+end