fix: single page keeps custom buttons instead of dropping the view (v0.1.2)

a single-page result (max_pages < 2) suppressed the navigation row by dropping the
whole view, which also discarded the consumer's custom per-page buttons. now: if the
page carries custom buttons, keep the view and rebuild with update_buttons(nav=False)
— nav items suppressed, custom buttons kept, and stop() NOT called so their callbacks
still fire. a page with no custom buttons keeps the original drop-the-view behavior.

verified by execution against real discord.py: single page + custom button -> start()
-> callback FIRES on click (view kept, stop() not called); negative control on the old
code drops the button entirely; the no-button single-page case is unregressed.

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

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "dpy_paginator"
-version = "0.1.1"
+version = "0.1.2"
 description = "Button-navigated paginator for discord.py — config-free, injectable emojis, installable."
 requires-python = ">=3.10"
 dependencies = [