i18n support for dark mode menu button

[shiami]

The menu button text "Light", "Dark", "Auto" is hard coded in the file below.
Please add i18n support.
Thanks!

docsy/layouts/partials/theme-toggler.html

Lines 37 to 59 in 712aa05

	<ul class="dropdown-menu dropdown-menu-end{{ if $isExamples }} shadow{{ end }}" aria-labelledby="bd-theme-text">
	<li>
	<button type="button" class="dropdown-item d-flex align-items-center" data-bs-theme-value="light" aria-pressed="false">
	<svg class="bi me-2 opacity-50"><use href="#sun-fill"></use></svg>
	Light
	<svg class="bi ms-auto d-none"><use href="#check2"></use></svg>
	</button>
	</li>
	<li>
	<button type="button" class="dropdown-item d-flex align-items-center" data-bs-theme-value="dark" aria-pressed="false">
	<svg class="bi me-2 opacity-50"><use href="#moon-stars-fill"></use></svg>
	Dark
	<svg class="bi ms-auto d-none"><use href="#check2"></use></svg>
	</button>
	</li>
	<li>
	<button type="button" class="dropdown-item d-flex align-items-center active" data-bs-theme-value="auto" aria-pressed="true">
	<svg class="bi me-2 opacity-50"><use href="#circle-half"></use></svg>
	Auto
	<svg class="bi ms-auto d-none"><use href="#check2"></use></svg>
	</button>
	</li>
	</ul>