Header and Tabs UI Improvements (#1290)

Some improvements to the Page Header and Tab UI.

Original |  New
:--------:|:-------:

![image](https://user-images.githubusercontent.com/62170586/197360886-046f1016-ca39-4b69-8134-99ba88e3a0c2.png)
|
![image](https://user-images.githubusercontent.com/62170586/197360819-7efd0d82-1412-465d-aefa-039164f97465.png)

![image](https://user-images.githubusercontent.com/62170586/197360872-f2ece5fd-7c0b-4e2c-8629-31524a412af5.png)
|
![image](https://user-images.githubusercontent.com/62170586/197360830-49f09e0d-619e-4fa9-8e38-8d05d9404185.png)

![image](https://user-images.githubusercontent.com/62170586/197281776-e3de6441-9417-4614-8b25-1aaef0b8da61.png)
|
![image](https://user-images.githubusercontent.com/62170586/197281698-40c66d34-76f3-4fd5-97e3-1c422b74844c.png)

![image](https://user-images.githubusercontent.com/62170586/196609248-ff150c6e-2995-4bcc-8573-49ffaf388446.png)
|
![image](https://user-images.githubusercontent.com/62170586/197323734-7c1a1b79-0f41-4bf2-96a3-dd38df9e1415.png)

![image](https://user-images.githubusercontent.com/62170586/196609329-b7a6f37e-e8c2-4004-a98b-73f837122ff8.png)
|
![image](https://user-images.githubusercontent.com/62170586/197323882-10141ffd-7411-4493-8291-b8000adc3cc5.png)


What?
- Create a new Scaffold component, which includes the header and tabs
required for a page.
- Use this component to wrap all the views that have a header.
- Ensures consistency in headers between different pages.
- [x] Add support to use custom html/component in place of title (for
repo page, pipeline page, etc)
- [x] Add support of right icon buttons (for repo page, pipeline page,
etc)
- [x] Refactor tabs handling using compositions (useTabsProvider, useTabsClient)
- [x] Make new header ui resposive

web/src/components/layout/scaffold/Header.vue

@@ -0,0 +1,64 @@
+<template>
+  <div class="bg-white dark:bg-dark-gray-900 border-b dark:border-gray-700">
+    <FluidContainer class="!py-0">
+      <div class="flex flex-wrap items-center justify-between py-4 <md:flex-row <md:gap-y-4">
+        <div
+          class="flex flex-wrap items-center justify-start <md:w-full <md:justify-center"
+          :class="{
+            'md:flex-1': searchBoxPresent,
+          }"
+        >
+          <IconButton v-if="goBack" icon="back" :title="$t('back')" class="mr-2 <md:hidden" @click="goBack" />
+          <h1 class="flex flex-wrap text-xl text-color items-center gap-x-2">
+            <slot name="title" />
+          </h1>
+        </div>
+        <TextField
+          v-if="searchBoxPresent"
+          class="w-auto !bg-gray-100 !dark:bg-dark-gray-600 <md:w-full <md:order-3"
+          input-class="!placeholder-gray-500"
+          :placeholder="$t('search')"
+          :model-value="search"
+          @update:model-value="(value: string) => $emit('update:search', value)"
+        />
+        <div
+          v-if="$slots.titleActions"
+          class="flex flex-wrap items-center justify-end gap-x-2 <md:w-full <md:justify-center"
+          :class="{
+            'md:flex-1': searchBoxPresent,
+          }"
+        >
+          <slot name="titleActions" />
+        </div>
+      </div>
+
+      <div v-if="enableTabs" class="flex flex-wrap justify-between">
+        <Tabs class="<md:order-2" />
+        <div
+          v-if="$slots.titleActions"
+          class="flex items-center justify-end gap-x-2 md:mb-2 <md:w-full <md:justify-center <md:order-1"
+        >
+          <slot name="tabActions" />
+        </div>
+      </div>
+    </FluidContainer>
+  </div>
+</template>
+
+<script setup lang="ts">
+import TextField from '~/components/form/TextField.vue';
+import FluidContainer from '~/components/layout/FluidContainer.vue';
+
+import Tabs from './Tabs.vue';
+
+export interface Props {
+  goBack?: () => void;
+  enableTabs?: boolean;
+  search?: string;
+}
+
+const props = defineProps<Props>();
+defineEmits(['update:search']);
+
+const searchBoxPresent = props.search !== undefined;
+</script>