docs: update privacy policy, add terms of service

docs/content/.vuepress/components/PluralKitBanner.vue

@@ -0,0 +1,55 @@
+<template>
+  <aside class="pkBanner" v-if="shouldShowBanner">
+    <div class="pkBannerText" v-html="bannerContent"></div>
+  </aside>
+</template>
+
+<script>
+  export default {
+    name: 'PluralKitBanner',
+    computed: {
+      shouldShowBanner() {
+        return typeof this.$site.themeConfig.pkBannerContent === "string"
+      },
+      bannerContent() {
+        return this.$site.themeConfig.pkBannerContent
+      },
+    },
+    beforeMount() {
+      if (this.shouldShowBanner) {
+        document.getElementsByTagName('html')[0].classList.add("pkBannerVisible")
+      }
+    },
+  }
+</script>
+
+<style lang="stylus">
+  html.pkBannerVisible .theme-container
+    position relative
+    margin-top 3rem
+
+    .navbar
+      top 3rem
+
+  .pkBanner
+    position fixed
+    top 0
+    left 0
+    right 0
+    height 3rem
+    background var(--bgColor)
+
+    .pkBannerText
+      padding 0.5rem 1rem
+      min-width 100%
+      height 3rem
+
+      background var(--warningBgColor)
+      color var(--textColor)
+
+      line-height 2rem
+      overflow auto hidden
+      white-space nowrap
+      word-break keep-all
+      text-align center
+</style>