feat(docs): split fish-config.md into docs/manual SSOT tree

docs/manual/02-path-setup.md

@@ -0,0 +1,25 @@
+---
+title: Path Setup
+manTitle: 2. PATH SETUP
+sidebar:
+  order: 2
+helpKeywords:
+- path
+---
+
+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)
+
+Cargo binaries are intentionally appended (lowest priority) to avoid
+shadowing system-installed Rust tools.
+
+---