docs(navigation): initial rewrite of Navigation docs (#330)

Author: rigor789

build/plugins/remark.js

@@ -1,3 +1,6 @@
+const low = require('lowlight');
+low.registerAlias('xml', [ 'vue', 'Vue' ]);
+
 const remark = require('remark');
 const lint = require('remark-preset-lint-recommended');
 const html = require('remark-html');
@@ -10,6 +13,7 @@ const remarkPing = require('remark-ping');
 const shortcodes = require('remark-shortcodes');
 const report = require('vfile-reporter');
 
+
 function processMarkdown(contents) {
   return new Promise((resolve, reject) => {
     remark()
@@ -101,4 +105,4 @@ module.exports = function permalinks(options = {}) {
 
     done();
   }
-};
+};

content/docs/en/routing/navigation.md

@@ -0,0 +1,71 @@
+---
+title: Navigation
+contributors: [rigor789]
+---
+
+Most apps are made of multiple screens the users can interact with. In order to present these different screens to the user, we need a way to navigate between them. NativeScript-Vue provides the following methods to achieve this: 
+* [`$navigateTo`](#)
+* [`$navigateBack`](#)
+* [`$showModal`](#)
+
+In NativeScript-Vue different screens are denoted by the [`<Page>`](#) tag.
+
+// todo: emphasize early on that `<Page>` tags are mandatory
+
+## A basic scenario: navigating to a different `<Page>`
+ 
+Let's say the user is presented with the default `<Page>` in our `Home.vue` component and we would like to navigate to a component we defined in `Settings.vue`:
+```vue
+<template>
+  <Page>
+    <ActionBar title="Settings" />
+    <StackLayout>
+      <!-- page content goes here -->
+    </StackLayout>
+  </Page>
+</template>
+```
+
+In our Home component, we first need to import the `<Settings>` component. Most navigation is triggered by the user, in this case we will attach a `@tap` handler to a `<Button>` and call our navigation in the handler.
+```vue
+<template>
+  <Page>
+    <ActionBar title="Home" />
+    <StackLayout>
+      <Button text="Go to Settings" @tap="onSettingsTap" />
+      <!-- page content goes here -->
+    </StackLayout>
+  </Page>
+</template>
+
+<script>
+import Settings from './Settings'
+
+export default {
+  methods: {
+    onSettingsTap() {
+      this.$navigateTo(Settings)
+    }
+  }
+}
+</script>
+```
+
+[You can try this example in the Playground](https://play.nativescript.org/?template=play-vue&id=Gsxbge)
+
+// todo: incorporate $navigateBack into the basic guide
+
+## A basic scenario: showing a modal `<Page>`
+
+Often times, we need to present the user with data that doesn't fit in the navigation flow. In these cases we can show a `<Page>` in a modal, completely independent of the current navigation history. 
+
+// todo: create example and walkthrough
+
+# Troubleshooting
+
+// todo
+
+```js
+this.$navigateTo(Component).catch(error => console.log(error))
+```
+