Make `git` optional for installation

[spywhere]

Make git optional for remote installation. We should be able to required curl / wget, tar for remote installation.

List of download mirrors

• https://github.com/spywhere/dotfiles/archive/refs/heads/$CLONE_REPO_BRANCH.tar.gz
• https://git.sr.ht/~spywhere/dots/archive/$CLONE_REPO_BRANCH.tar.gz

curl <link to tarball> -o <tarball>
mkdir -p "$HOME/$DOTFILES"
tar zxf <tarball> -C "$HOME/$DOTFILES" --strip-components=1

and once all is done, check if git is installed then convert it to git repo using

cd "$HOME/$DOTFILES"
git init
git remote add origin "$CLONE_REPO"
git fetch # fetch the changes
git checkout -f "$CLONE_REPO_BRANCH" # check out branch, discard any changes

On line 541:

dotfiles/install.sh

Lines 534 to 550 in 796d22e

	_try_run_install() {
	try_run_install__skip_update=0
	if test "$HAS_LOCAL_COPY" -eq 0; then
	if test "$RUN_LOCAL" -ge 1; then
	error "local copy of dotfiles is not found at $HOME/$DOTFILES"
	quit 1
	fi
	if test "$VERBOSE" -le 1; then
	clone "$CLONE_REPO" "$HOME/$DOTFILES" "dotfiles into $HOME/$DOTFILES" --branch "$CLONE_REPO_BRANCH"
	else
	clone "$CLONE_REPO" "$HOME/$DOTFILES" "dotfiles" --branch "$CLONE_REPO_BRANCH"
	fi
	try_run_install__skip_update=1
	fi
	cd "$HOME/$DOTFILES"