Fix non-idiomatic config and bugs found during dotfiles review

[michaelbarton]

Shell configs:

• Remove wrong shebang from fish config.fish
• Fix LESS_TERMCAP vars from set -Ux to set -gx (avoid disk writes per shell)
• Remove conflicting LC_CTYPE=C (overridden by LC_ALL) and unused DISPLAY=:0
• Add missing PYTHON_BIN to fish PATH
• Fix pbcat to use command cat (bypass bat alias)
• Fix ssh function to only redirect to mosh with exactly 1 arg
• Fix wt function to avoid cd (use absolute paths with rg)
• Fix JAVA_HOME to be conditional (no error if Java not installed)
• Replace slow brew --prefix with direct binary check in bashrc
• Guard bash-specific init (starship/zoxide/atuin/mise) with BASH_VERSION
  check to prevent double-initialization when zsh sources bashrc

Git:

• Merge duplicate [core] sections in gitconfig
• Update sw/swb/pd aliases from checkout to switch (modern idiom)
• Remove dead [ghi] section (archived tool)
• Remove Cargo.lock and package-lock.json from global gitignore
• Rewrite clean_branches.sh: fix duplicate shebang, protect current branch

Neovim:

• Update trouble.lua to Trouble v3 API (TroubleToggle -> Trouble toggle)
• Remove redundant todo-comments.lua (already in LazyVim core)
• Remove deprecated neodev section from .neoconf.json
• Add mini-move extra for line/selection motion keybindings

Ansible:

• Fix fish completion symlink dest to completions/ directory
• Remove broken yml/format_yml.py link (file doesn't exist)
• Remove deprecated ruff-lsp from neovim venv (use ruff server)

Scripts:

• Fix offlineimap.py: broken format string, replace removed commands module
• Fix csv_to_parquet.py: check argc before accessing sys.argv[2]
• Quote variables in md2pdf.sh and md2docx.sh pandoc calls
• Update mutt editor from vim -f to nvim

Misc:

• Fix wgetrc email to match canonical address
• Remove unused Clojure/lein config

https://claude.ai/code/session_01V6HuQCwkGJWWzTmUGPWhhe