Add editGitlab compo

components/EditGitLab.vue

+<template>
+  <ProseA :to="path" target="blank">
+    <span> Edit this page on GitLab </span>
+  </ProseA>
+</template>
+<script setup lang="ts">
+import { ref } from "vue";
+const { page } = useContent();
+const config = useDocus();
+const props = defineProps<{
+  owner: string;
+  repo: string;
+  branch: string;
+}>();
+const baseUrl = ref(new URL("https://gitlab.pasteur.fr"));
+const path = ref(
+  new URL(
+    `/${props.owner}/${props.repo}/-/edit/${props.branch}/content/${page.value._file}`,
+    baseUrl.value
+  ).href
+);
+</script>