docs(setup): version aliases.zsh + gitconfig.txt under docs/setup/dotfiles

80-dotfiles.sh was reading notes/aliases.zsh and notes/gitconfig.txt,
but notes/ is gitignored - fresh clones on the dev VM hit "file not
found" and the script aborted.

Move both templates to docs/setup/dotfiles/ where they ship with every
clone. gitconfig.txt's [user] block now carries placeholder identity
(your name / your.email@example.com) instead of the original author's
identity - the script overlays the prompted values at install time so
the file content doesn't matter functionally, but the placeholders
read more clearly as "fill me in".

80-dotfiles.sh source paths flipped from $REPO_ROOT/notes/... to
$REPO_ROOT/docs/setup/dotfiles/.... Step-3 table row, §8.4 (dotfiles
repo appendix), and the setup README index updated accordingly. New
"dotfiles/" section in the setup README documents the folder.

The notes/aliases.zsh and notes/gitconfig.txt on existing dev
workstations are unaffected - those files live outside the repo and
this PR doesn't touch them.

docs/setup/dotfiles/aliases.zsh

@@ -0,0 +1,36 @@
+# Project-wide zsh aliases for apf-portal. Installed by 80-dotfiles.sh as
+# a symlink at ~/.oh-my-zsh/custom/aliases.zsh, so any change here ripples
+# to every dev's shell on their next zsh restart.
+#
+# Per-dev customizations belong elsewhere (private dotfiles repo or
+# additional files under ~/.oh-my-zsh/custom/).
+
+# Navigation
+alias ls="eza --icons"
+alias la="eza -alF --icons"
+alias ll="eza -lA --icons"
+alias lh="eza -lAh --icons --git"
+alias lr="eza -lAhR --icons --git"
+alias lt="ls -lAhtr"
+alias ltr="eza --tree --icons"
+alias l="ls -CF"
+alias cdworks="cd ~/Works/apf_portal"
+
+# Files
+alias bat="batcat"
+
+# Search
+alias find="fd"
+
+# Git
+alias gitstat='git status'
+alias gitcount='git status | wc -l'
+alias gitgb='git log --oneline --graph --decorate'
+alias gitgraph='git log --oneline --graph --decorate --branches'
+alias gitfullstat='git log --graph --decorate --branches --stat'
+alias gitprune='git remote update origin --prune'
+alias gitfp='git fetch --all --prune'
+
+# Dev
+alias ng="pnpm exec ng"
+alias nx="pnpm exec nx"