Remove Oh My ZSH dependency of my ZSH configuration

zsh/.profile.d/ssh-agent.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+start_keychain() {
+  local ssh_key="$1"
+  local gpg_key="$2"
+  # Check if keychain is installed
+  if command -v keychain >/dev/null 2>&1; then
+    SHORT_HOST=${SHORT_HOST:-${(%):-%m}}
+
+    # Start keychain quietly with no GUI prompts for ssh agents
+    eval "$(keychain --quiet --nogui $ssh_key $gpg_key)"
+
+    # Get the filenames to store/lookup the environment from
+    _keychain_env_sh="$HOME/.keychain/$SHORT_HOST-sh"
+    _keychain_env_sh_gpg="$HOME/.keychain/$SHORT_HOST-sh-gpg"
+
+    # Source environment settings.
+    [ -f "$_keychain_env_sh" ]     && . "$_keychain_env_sh"
+    [ -f "$_keychain_env_sh_gpg" ] && . "$_keychain_env_sh_gpg"
+  else
+    echo "Warning: keychain is not installed. Please install keychain to manage ssh/gpg agents."
+  fi
+}
+
+# start_keychain "$HOME/.ssh/id_ed25519_nymph"