Add tooltip-format support to hyprland language

[delitzer]

Fixes #3693.

Adds tooltip-format support to the hyprland/language module using the same layout replacements already available to format:

• {short}
• {shortDescription}
• {long}
• {variant}

Also falls back to the displayed layout text when tooltip-format is not configured, matching the sway/language behavior, and documents tooltip plus tooltip-format in the manpage.

Verification:

• git diff --check
• Compared the three committed fork files against the local patched files

Not run:

• meson build/test; meson is not installed on this macOS host
• clang-format; clang-format is not installed on this macOS host