docs(test): add markdown latex render smoke test

README.md

@@ -0,0 +1,34 @@
+# Trade T2 Markdown Smoke Test
+
+This repository checks `Markdown + LaTeX` rendering in Gitea.
+
+Inline math: $E = mc^2$.
+
+Display math:
+
+$$
+\nabla \cdot \vec{E} = \frac{\rho}{\varepsilon_0}
+$$
+
+Another equation:
+
+$$
+\mathrm{PnL}(t) = \sum_{i=1}^{n} q_i \cdot \left(p_i(t) - p_i(0)\right)
+$$
+
+Matrix example:
+
+$$
+A =
+\begin{bmatrix}
+1 & 2 & 3 \\
+0 & 1 & 4 \\
+5 & 6 & 0
+\end{bmatrix}
+$$
+
+And a short identity:
+
+$$
+\int_0^{2\pi} \sin(x)\,dx = 0
+$$