WEBDEV-9445: Move the other elements icons into the icons folder

README.md

@@ -351,6 +351,7 @@ Outside lit, use the raw file at `@internetarchive/elements/icons/search.svg`.
 
 - **Decorative by default.** The root `<svg>` has `aria-hidden="true"` and `focusable="false"`. If an icon is the only content of a control, label the control (`aria-label`), or wrap the icon in an element with `role="img"` and an `aria-label`.
 - **Color and size.** Icons are filled with `currentColor` and sized `1em` by `width`/`height` on the root, so they follow the surrounding text. Set `font-size` or override `width`/`height` in CSS to resize.
+- **Used by.** `ia-item-navigator`, `ia-status-indicator`, `ia-combo-box`, `ia-dropdown-search-bar` and `ia-scrubber-bar` draw their icons from this folder. Recolor one with `color`, since the glyph paints with `currentColor`.
 - **No barrel.** There's deliberately no `icons/index`. Every icon is its own module, so a page that imports one loads one.
 - **`sideEffects`.** `package.json` lists the trees that do work at import time (`dist/src/elements/**`, `dist/src/labs/**`, `dist/src/locales/**`). Elements register themselves when imported, so a package-wide `"sideEffects": false` would let a bundler drop `import '@internetarchive/elements/ia-button/ia-button'`. Everything else, including `dist/src/icons/**`, is safe to tree-shake. `src/util/icons-bundle.node.test.ts` bundles the built package to check both.