cfw_environment: restore side-by-side layout of Sys/Emu comparison

This requires a few hacks:
- Disabled aside menu for this page
  - This breaks the continuity of UI across this page and others, but
    without it the layout is too small for the side-by-side to make
    sense.
- Added markdown-it handles for grid cards

docs/.vitepress/config.mjs

@@ -53,6 +53,26 @@ export default defineConfig({
   },
   markdown: {
     config: (md) => {
+      md.use(container, "cards", {
+        render: (tokens, idx) => {
+          const token = tokens[idx];
+          if (token.nesting === 1) {
+            return `<div class="cards">\n`;
+          } else {
+            return `</div>\n`;
+          }
+        }
+      });
+      md.use(container, 'card', {
+        render: (tokens, idx) => {
+          const token = tokens[idx];
+          if (token.nesting === 1) {
+            return `<div class="card">\n`;
+          } else {
+            return `</div>\n`;
+          }
+        }
+      });
       md.use(container, "tabs", {
         render: (tokens, idx) => {
           const token = tokens[idx];

docs/user_guide/all/cfw_environment.md

@@ -1,3 +1,7 @@
+---
+aside: false
+---
+
 # CFW on sysMMC vs. CFW on emuMMC
 
 A "CFW Environment" describes the context in which you are using custom firmware (CFW).
@@ -17,7 +21,10 @@ For more information on terminology, please refer to the [glossary](../../extras
 
 -----
 
-:::: tip
+::::: cards
+
+:::: card
+
 ### emuMMC CFW (Recommended)
 #### CFW on emuMMC has the following benefits:
 
@@ -54,8 +61,6 @@ This path of the guide ***also*** includes sysCFW as launch option.
 
 :::
 
------
-
 ::: info
 
 To proceed with CFW on **emuMMC**, click on the button below:
@@ -66,7 +71,7 @@ To proceed with CFW on **emuMMC**, click on the button below:
 
 ::::
 
-:::: tip
+:::: card
 
 ### sysCFW (CFW on sysMMC)
 #### CFW on sysMMC has the following benefits:
@@ -105,6 +110,8 @@ To proceed with CFW on **sysMMC**, click on the button below:
 
 ::::
 
+:::::
+
 ### Modchip Instability
 
 ::: danger