add git config and zsh configs (using zim)

.config/zsh/config.d/00-zim

@@ -0,0 +1,17 @@
+#:vim set ft=zsh:
+zstyle ':zim:zmodule' use 'degit'
+ZIM_HOME=${XDG_CACHE_DIR}/zim
+
+# Download zimfw plugin manager if missing.
+if [[ ! -e ${ZIM_HOME}/zimfw.zsh ]]; then
+  curl -fsSL --create-dirs -o ${ZIM_HOME}/zimfw.zsh \
+      https://github.com/zimfw/zimfw/releases/latest/download/zimfw.zsh
+fi
+
+# Install missing modules, and update ${ZIM_HOME}/init.zsh if missing or outdated.
+if [[ ! ${ZIM_HOME}/init.zsh -nt ${ZDOTDIR:-${HOME}}/.zimrc ]]; then
+  source ${ZIM_HOME}/zimfw.zsh init -q
+fi
+
+# Initialize modules
+source ${ZIM_HOME}/init.zsh