Migration to typescript: first step

Add vue cli typescript support
Rename .js to .ts
Use class and annotations in App and NavBar
Add tslint

js/src/api/_entrypoint.ts

@@ -0,0 +1,26 @@
+/**
+ * Host of the instance
+ *
+ * Required
+ *
+ * Example: framameet.org
+ */
+export const MOBILIZON_INSTANCE_HOST = process.env.MOBILIZON_INSTANCE_HOST;
+
+/**
+ * URL on which the API is. "/api" will be added at the end
+ *
+ * Required
+ *
+ * Example: https://framameet.org
+ */
+export const GRAPHQL_API_ENDPOINT = process.env.GRAPHQL_API_ENDPOINT;
+
+/**
+ * URL with path on which the API is. Replaces GRAPHQL_API_ENDPOINT if used
+ *
+ * Optional
+ *
+ * Example: https://framameet.org/api
+ */
+export const GRAPHQL_API_FULL_PATH = process.env.GRAPHQL_API_FULL_PATH;