Rename default branch from master to main

Update install URLs, workflow triggers, badge links, and CLAUDE.md
to reference the new main branch.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: alanrrb

.github/workflows/test.yml

@@ -2,9 +2,9 @@ name: Test Install
 
 on:
   push:
-    branches: [master, main]
+    branches: [main]
   pull_request:
-    branches: [master, main]
+    branches: [main]
 
 jobs:
   ubuntu:

CLAUDE.md

@@ -10,7 +10,7 @@ This is **Campus Code Dotfiles (cc_dotfiles)** — a shared dotfiles distributio
 
 ```bash
 # Remote install (clones to ~/.cc_dotfiles, then runs rake install)
-bash -c "$(curl -fSs https://raw.githubusercontent.com/campuscode/cc_dotfiles/master/install.sh)"
+bash -c "$(curl -fSs https://raw.githubusercontent.com/campuscode/cc_dotfiles/main/install.sh)"
 
 # Local install (from a cloned repo)
 LOCAL_INSTALL=1 bash install.sh

README.md

@@ -29,7 +29,7 @@ sudo apt-get install -y curl
 ## Install
 
 ```bash
-bash -c "$(curl -fSs https://raw.githubusercontent.com/campuscode/cc_dotfiles/master/install.sh)"
+bash -c "$(curl -fSs https://raw.githubusercontent.com/campuscode/cc_dotfiles/main/install.sh)"
 ```
 
 You will be prompted for your password to change the default shell to zsh.
@@ -72,5 +72,5 @@ Every config file sources a `.local` counterpart if present. Place your personal
 
 - `SKIP_DOCKER=1` — skip Docker installation on Linux
 
-[build-status-image]: https://github.com/campuscode/cc_dotfiles/actions/workflows/test.yml/badge.svg?branch=master
-[build-status]: https://github.com/campuscode/cc_dotfiles/actions/workflows/test.yml?query=branch%3Amaster
+[build-status-image]: https://github.com/campuscode/cc_dotfiles/actions/workflows/test.yml/badge.svg?branch=main
+[build-status]: https://github.com/campuscode/cc_dotfiles/actions/workflows/test.yml?query=branch%3Amain