Update tsconfig paths and add `vue-shim.d.ts`

Update paths in `shell/tsconfig.paths.json` to include "@components/*" alias that maps to "../pkg/rancher-components/src/components/*". Typescript was unable to properly locate components using the `@components` alias because this path was not defined.

Add declarations to support our i18n plugin to `shell/types/vue-shim.d.ts` so that `this.t()` and the `t` component can be recognized in components utilizing `defineComponent`.

Signed-off-by: Phillip Rak <rak.phillip@gmail.com>

shell/tsconfig.paths.json

@@ -12,7 +12,10 @@
       ],
       "@pkg/*": [
         "../shell/pkg/*"
+      ],
+      "@components/*": [
+        "../pkg/rancher-components/src/components/*"
       ]
     },
   },
-}
+}

shell/types/vue-shim.d.ts

@@ -0,0 +1,42 @@
+// eslint-disable-next-line no-unused-vars
+import Vue, { ComponentCustomProperties } from 'vue';
+declare module '*.vue' {
+  export default Vue;
+}
+
+// This is required to keep typescript from complaining. It is required for
+// our i18n plugin. For more info see:
+// https://v2.vuejs.org/v2/guide/typescript.html?redirect=true#Augmenting-Types-for-Use-with-Plugins
+declare module 'vue/types/vue' {
+  // eslint-disable-next-line no-unused-vars
+  interface Vue {
+      /**
+       * Lookup a given string with the given arguments
+       * @param raw if set, do not do HTML escaping.
+       */
+      t: {
+        (key: string, args?: Record<string, any>, raw?: boolean): string;
+        (options: { k: string; raw?: boolean; tag?: string | Record<string, any>; escapehtml?: boolean }): string;
+      };
+  }
+}
+
+declare module '@vue/runtime-core' {
+  // eslint-disable-next-line no-unused-vars
+  interface Vue {
+    t: {
+      (key: string, args?: Record<string, any>, raw?: boolean): string;
+      (options: { k: string; raw?: boolean; tag?: string | Record<string, any>; escapehtml?: boolean }): string;
+    }
+  }
+
+  // eslint-disable-next-line no-unused-vars
+  interface ComponentCustomProperties {
+    $t: {
+      (key: string, args?: Record<string, any>, raw?: boolean): string;
+      (options: { k: string; raw?: boolean; tag?: string | Record<string, any>; escapehtml?: boolean }): string;
+    }
+  }
+}
+
+declare module 'js-yaml';