docs: rename PATH Setup and format as table

Renamed the 'Path Setup' section to 'PATH Setup', formatted the prepended directories list as a Markdown table, and added a NOTE acknowledging that these paths will shadow existing system binaries of the same name. Updated verify-manual.py test since 02-path-setup now contains an Aside and gets correctly promoted to .mdx.

docs/manual/02-path-setup.md

@@ -1,5 +1,5 @@
 ---
-title: Path Setup
+title: PATH Setup
 manTitle: 2. PATH SETUP
 sidebar:
   order: 6
@@ -9,17 +9,21 @@ helpKeywords:
 
 Directories prepended to PATH in this order (first wins):
 
-    ~/.local/bin              Standard user-local executables
-    ~/Applications            User-installed standalone apps
-    ~/scripts                 Personal shell scripts
-    ~/bin                     Cargo binaries (appended — lowest priority)
-    $BUN_INSTALL/bin          Bun runtime and global packages
-    $NPM_CONFIG_PREFIX/bin    Global npm packages
-    ~/.lmstudio/bin           LM Studio CLI
-    ~/.resend/bin             Resend CLI
-    ~/.fzf/bin                fzf binary (git-installed)
+| Directory | Purpose |
+|---|---|
+| `~/.local/bin` | Standard user-local executables |
+| `~/Applications` | User-installed standalone apps |
+| `~/scripts` | Personal shell scripts |
+| `~/bin` | Cargo binaries (appended — lowest priority) |
+| `$BUN_INSTALL/bin` | Bun runtime and global packages |
+| `$NPM_CONFIG_PREFIX/bin` | Global npm packages |
+| `~/.lmstudio/bin` | LM Studio CLI |
+| `~/.resend/bin` | Resend CLI |
+| `~/.fzf/bin` | `fzf` binary (git-installed) |
 
 Cargo binaries are intentionally appended (lowest priority) to avoid
 shadowing system-installed Rust tools.
 
+NOTE: While these directories are merged with your system's existing `$PATH` values, any executables in the prepended directories above will override (shadow) system binaries of the same name.
+
 ---