docs: rename to Rootiest Fish Configuration in README and site title

Both said the generic 'Fish Shell Configuration' -- the site nav already
reads 'Rootiest Fish Config'. Reworded README's opening line to match
the sentiment, not just the name swap.

README.md

@@ -1,8 +1,9 @@
-# Fish Shell Configuration
+# Rootiest Fish Configuration
 
-A feature-rich Fish shell configuration for CachyOS (Arch Linux),
-built around a Catppuccin Mocha aesthetic with a curated set of modern
-CLI tool integrations, smart shell functions, and a heavily customized
+This isn't a generic Fish shell configuration — it's the Rootiest Fish
+Configuration: a feature-rich setup for CachyOS (Arch Linux), built
+around a Catppuccin Mocha aesthetic with a curated set of modern CLI
+tool integrations, smart shell functions, and a heavily customized
 abbreviation system for keyboard-driven workflows.
 
 📖 **[Project Wiki](https://fish.rootiest.fyi/)**

docs/manual/index.md

@@ -1,5 +1,5 @@
 ---
-title: Fish Shell Configuration
+title: Rootiest Fish Configuration
 description: Reference manual for the rootiest fish configuration.
 manTitle: DESCRIPTION
 sidebar: