Added readme and fixed minor issues

Author: ariostas

README.md

@@ -0,0 +1,10 @@
+# Reviving Formulate
+### PyHEP, October 29, 2025
+
+Click on this link to view the slides:
+
+<p align="center">
+  <a href="https://ariostas-talks.github.io/2025-10-29-formulate/">
+    <img src="https://raw.githubusercontent.com/marimo-team/marimo/refs/heads/main/docs/_static/marimo-logotype-horizontal.png" alt="Launch JupyterLite" height="60">
+  </a>
+</p>

slides.py

@@ -211,7 +211,8 @@ def _(formulate, init_root_options, mo):
     ```
     {from_root}
     ```
-
+    """)], justify="center"),
+            mo.hstack([mo.md(f"""
     And they can be converted into the desired syntax with
     """)], justify="center"),
             mo.hstack(
@@ -300,7 +301,8 @@ def _(formulate, init_numexpr_options, mo):
     ```
     {from_numexpr}
     ```
-
+    """)], justify="center"),
+            mo.hstack([mo.md(f"""
     And they can be converted into the desired syntax with
     """)], justify="center"),
             mo.hstack(
@@ -385,7 +387,8 @@ def _(formulate, init_root_options2, mo):
     ```
     {from_root2}
     ```
-
+    """)], justify="center"),
+            mo.hstack([mo.md(f"""
     And they can be converted into the desired syntax with
     """)], justify="center"),
             mo.hstack(
@@ -593,7 +596,8 @@ def _(formulate, init_from_options, mo, text_area):
     ```
     {expr}
     ```
-
+    """)], justify="center"),
+            mo.hstack([mo.md(f"""
     And they can be converted into the desired syntax with
     """)], justify="center"),
             mo.hstack(
@@ -612,7 +616,7 @@ def _(formulate, init_from_options, mo, text_area):
             ),
         ],
         align="stretch",
-    
+
     )
     return