js: reorganize Javascript file structure.

Move Javascript files from app/components/**/*.js back to app/javascript/src/javascripts/*.js.
This way Javascript files are in one place, which simplifies import paths and makes it
easier to see all Javascript at once.

app/components/comment_votes_tooltip_component/comment_votes_tooltip_component.js

@@ -1,65 +0,0 @@
-import Utility from "../../javascript/src/javascripts/utility.js";
-import { delegate, hideAll } from 'tippy.js';
-import 'tippy.js/dist/tippy.css';
-
-class CommentVotesTooltipComponent {
-  // Trigger on the comment score link; see CommentComponent.
-  static TARGET_SELECTOR = "span.comment-score";
-  static SHOW_DELAY = 125;
-  static HIDE_DELAY = 125;
-  static DURATION = 250;
-  static instance = null;
-
-  static initialize() {
-    if ($(CommentVotesTooltipComponent.TARGET_SELECTOR).length === 0) {
-      return;
-    }
-
-    CommentVotesTooltipComponent.instance = delegate("body", {
-      allowHTML: true,
-      appendTo: document.querySelector("#comment-votes-tooltips"),
-      delay: [CommentVotesTooltipComponent.SHOW_DELAY, CommentVotesTooltipComponent.HIDE_DELAY],
-      duration: CommentVotesTooltipComponent.DURATION,
-      interactive: true,
-      maxWidth: "none",
-      target: CommentVotesTooltipComponent.TARGET_SELECTOR,
-      theme: "common-tooltip",
-      touch: false,
-
-      onShow: CommentVotesTooltipComponent.onShow,
-      onHide: CommentVotesTooltipComponent.onHide,
-    });
-  }
-
-  static async onShow(instance) {
-    let $target = $(instance.reference);
-    let $tooltip = $(instance.popper);
-    let commentId = $target.parents("[data-id]").data("id");
-
-    hideAll({ exclude: instance });
-
-    try {
-      $tooltip.addClass("tooltip-loading");
-
-      instance._request = $.get(`/comments/${commentId}/votes`, { variant: "tooltip" });
-      let html = await instance._request;
-      instance.setContent(html);
-
-      $tooltip.removeClass("tooltip-loading");
-    } catch (error) {
-      if (error.status !== 0 && error.statusText !== "abort") {
-        Utility.error(`Error displaying votes for comment #${commentId} (error: ${error.status} ${error.statusText})`);
-      }
-    }
-  }
-
-  static async onHide(instance) {
-    if (instance._request?.state() === "pending") {
-      instance._request.abort();
-    }
-  }
-}
-
-$(document).ready(CommentVotesTooltipComponent.initialize);
-
-export default CommentVotesTooltipComponent;