Implement loading (#104)

* Implement loading

* LoadingBar

* Run linter

* Update App.vue

* Loading bar all the things

* Update SplashScreen.vue

* Update SplashScreen.vue

* Update App.vue

* initial revert

* Update Instance.vue

* revert css

* Fix instance

* More reverting

* Run lint

* Finalize changes

* Revert "Merge branch 'master' into loading"

This reverts commit 3014e765fb6fb343f3030fd8a822edd97fb2af41, reversing
changes made to b780e859d2b53a203eb3561ba3be88af083d9c15.

* Fix loading issues

* fix lint

* Revert "Revert "Merge branch 'master' into loading""

This reverts commit 971ef8466613579b7f523edbd25b692df62d0f86.

---------

Co-authored-by: Jai A <jaiagr+gpg@pm.me>

theseus_gui/src/components/ui/ProgressBar.vue

@@ -0,0 +1,33 @@
+<template>
+  <div class="progress-bar">
+    <div class="progress-bar__fill" :style="{ width: `${progress}%` }"></div>
+  </div>
+</template>
+
+<script setup>
+defineProps({
+  progress: {
+    type: Number,
+    required: true,
+    validator(value) {
+      return value >= 0 && value <= 100
+    },
+  },
+})
+</script>
+
+<style scoped>
+.progress-bar {
+  width: 100%;
+  height: 0.5rem;
+  background-color: var(--color-button-bg);
+  border-radius: var(--radius-lg);
+  overflow: hidden;
+}
+
+.progress-bar__fill {
+  height: 100%;
+  background-color: var(--color-brand);
+  transition: width 0.3s;
+}
+</style>