fix: choose() select path emits null label for emoji-only keys

add_option(label=label, ...) passed label=None straight through for an
emoji-only key (_split_key returns (None, emoji)), serializing
{"label": null, ...} which Discord's select-option schema rejects
(1-100 char label required). The <=5-option button path is unaffected
(a button may be emoji-only). Fall back to the key's own text form
(or a single space) as the label when _split_key yields none, so the
emoji is still shown via emoji= but the option always carries a
non-empty label.

Bump 0.1.1 -> 0.1.2.

Signed-off-by: disqualifier <dev@disqualifier.me>

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "dpy_commons"
-version = "0.1.1"
+version = "0.1.2"
 description = "Shared discord.py utilities — message/embed parsing, limit-fitting, link extraction, chunking, timestamps, await-prompts, limit-safe send. Config-free, installable."
 requires-python = ">=3.10"
 dependencies = [