feat(themes): add nekolight theme (#655)

Co-authored-by: Koichi Murase <myoga.murase@gmail.com>

themes/THEMES.md

@@ -171,6 +171,10 @@
 
 [![](n0qorg/n0qorg-dark.png)](n0qorg/n0qorg-dark.png)
 
+## `nekolight`
+
+[![](nekolight/nekolight-dark.jpg)](nekolight/nekolight-dark.jpg)
+
 ## `nekonight`
 
 [![](nekonight/nekonight-dark.jpg)](nekonight/nekonight-dark.jpg)

themes/nekolight/README.md

@@ -0,0 +1,18 @@
+# NekoLight prompt theme
+
+Nekolight is an Oh-My-Bash prompt theme inspired by Starship and designed to be simple and lightweight.
+
+![Nekolight theme](nekolight-dark.jpg)
+
+## 🚀 Installation
+
+Prerequisites
+- A Nerd Font or Powerline Font installed and enabled in your terminal (for example, try the FiraCode Nerd Font).
+
+After installing the Nerd Fonts font, just modify the following line in your ~/.bashrc
+
+```shell
+OSH_THEME="nekolight"
+```
+
+and then to load the theme in your terminal you must type `source ~/.bashrc`.

themes/nekolight/nekolight.theme.sh

@@ -0,0 +1,25 @@
+#! bash oh-my-bash.module
+
+_omb_theme_nekolight_version='1.0.0'
+_omb_theme_nekolight_symbol=""
+
+function _omb_theme_nekolight_git_info() {
+  if _omb_prompt_git rev-parse --is-inside-work-tree &>/dev/null; then
+    local branch=$(_omb_prompt_git symbolic-ref --short HEAD 2>/dev/null || _omb_prompt_git rev-parse --short HEAD 2>/dev/null)
+
+    if _omb_prompt_git diff --quiet 2>/dev/null && _omb_prompt_git diff --cached --quiet 2>/dev/null; then
+      _omb_util_print "on ${_omb_prompt_bold_green} ${_omb_theme_nekolight_symbol} ${branch} ${_omb_prompt_normal}"
+    else
+      _omb_util_print "on ${_omb_prompt_bold_red} ${_omb_theme_nekolight_symbol} ${branch}${_omb_prompt_normal}"
+    fi
+  fi
+}
+
+function _omb_theme_PROMPT_COMMAND() {
+  local display_dir="${_omb_prompt_bold_blue}\w${_omb_prompt_normal}"
+  local git_status=$(_omb_theme_nekolight_git_info)
+
+  PS1="${display_dir} ${git_status}\n❯ "
+}
+
+_omb_util_add_prompt_command _omb_theme_PROMPT_COMMAND