Initial commit: linux-provision repo

Distribution-agnostic provisioning script that sets up a new Linux machine
(Detected via lib/distro.sh - supports Debian/Ubuntu/Pop and Fedora families).

13 stages covering:
- System packages, external repos, toolchains (nvm, uv, Python)
- Shell config (zsh, oh-my-zsh, p10k), git, SSH
- Custom uv tools from ~40 git repos
- Desktop config (keybindings, hotkeys, ghostty, fonts)
- Docker, system tweaks, browser/app installs
- Custom systemd user services (porridge, swayidle, mempi-sync, etc.)
- API keys loaded from Bitwarden at shell startup

config/git/gitconfig

@@ -0,0 +1,49 @@
+[user]
+	name = Your Name
+	email = your.email@example.com
+	signingkey = ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAA... your-public-key-comment
+[init]
+	defaultBranch = main
+[credential "https://git.julianprester.com"]
+	provider = generic
+[core]
+	compression = 0
+	excludesfile = ~/.gitignore
+	editor = nano
+[column]
+	ui = auto
+[branch]
+	sort = -committerdate
+[tag]
+	sort = version:refname
+[diff]
+	algorithm = histogram
+	colorMoved = plain
+	mnemonicPrefix = true
+	renames = true
+[push]
+	default = simple
+	autoSetupRemote = true
+	followTags = true
+[pull]
+	rebase = true
+[fetch]
+	prune = true
+	pruneTags = true
+	all = true
+[help]
+	autocorrect = prompt
+[commit]
+	verbose = true
+	gpgsign = true
+[rerere]
+	enabled = true
+	autoupdate = true
+[rebase]
+	autoSquash = true
+	autoStash = true
+	updateRefs = true
+[merge]
+	conflictstyle = zdiff3
+[gpg]
+	format = ssh