build: switch from yarn to npm to manage js dependencies and move js contents to root

yarn v1 is being deprecated and starts to have some issues

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

tests/unit/svgTransform.ts

@@ -0,0 +1,15 @@
+// eslint-disable-next-line @typescript-eslint/no-var-requires
+const vueJest = require("vue-jest/lib/template-compiler");
+
+module.exports = {
+  process(content: any) {
+    const { render } = vueJest({
+      content,
+      attrs: {
+        functional: false,
+      },
+    });
+
+    return `module.exports = { render: ${render} }`;
+  },
+};