Add tabularx + table box to preamble

preamble.tex

@@ -23,7 +23,7 @@
 
 % Tables
 \usepackage{booktabs}
-% \usepackage{tabularx}
+\usepackage{tabularx}
 % \usepackage{tablefootnote}
 % \usepackage{makecell}
 % \usepackage{color,colortbl}
@@ -358,3 +358,15 @@
   before skip=\intextsep,
   after skip=\intextsep,
 }
+
+% A box surrounding tables
+\tcolorboxenvironment{table}{
+  enhanced,
+  float=htb,
+  arc=2pt,
+  boxrule=0.5pt,
+  colframe=black,
+  colback=white,
+  before skip=\intextsep,
+  after skip=\intextsep,
+}