feat: add ghcs and ghce abbrs

Author: Asim-Tahir

.editorconfig

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+root = true
+
+charset = utf-8
+end_of_line = lf
+tab_width = 1
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2025 Asim Tahir
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+<img src="https://cdn.rawgit.com/oh-my-fish/oh-my-fish/e4f1c2e0219a17e2c748b824004c8d0b38055c16/docs/logo.svg" align="left" width="192px" height="192px"/>
+<img align="left" width="0" height="192px" hspace="10"/>
+
+### `github-copilot-cli.fish`
+
+> `GitHub Copilot CLI` plugin for [Oh My Fish][omf] and [Fisher][fisher],
+
+[![MIT License](https://img.shields.io/badge/license-MIT-007EC7.svg?style=flat-square)](/LICENSE)
+[![Fish Shell v3.6.0](https://img.shields.io/badge/fish-v3.6.0-007EC7.svg?style=flat-square)](https://fishshell.com)
+[![Oh My Fish Framework](https://img.shields.io/badge/Oh%20My%20Fish-Framework-007EC7.svg?style=flat-square)][omf]
+
+<br/>
+
+## Prerequisites
+
+- [GitHub CLI](https://cli.github.com/) installed and authenticated.
+- [GitHub Copilot CLI extension](https://docs.github.com/en/copilot/managing-copilot/configure-personal-settings/installing-github-copilot-in-the-cli) installed.
+
+## Install
+
+[Oh My Fish][omf]:
+
+```fish
+omf install https://github.com/Asim-Tahir/github-copilot-cli.fish
+```
+
+[Fisher][fisher]:
+
+```fish
+fisher install Asim-Tahir/github-copilot-cli.fish
+```
+
+## Abbreviations Usage
+
+After installing the [`github-copilot-cli.fish`][repo] plugin, can inspect the abbreviations with the following command:
+
+```fish
+abbr --show | grep ghcs
+```
+
+| Abbreviation | Command              |
+| ------------ | -------------------- |
+| `ghcs`       | `gh copilot suggest` |
+| `ghce`       | `gh copilot explain` |
+
+# Credit
+
+Base structure heavily inspired from [`jhillyerd/plugin-git`](https://github.com/jhillyerd/plugin-git). Thanks for the amazing plugin.
+
+# License
+
+[MIT][license] © [Asim Tahir][author]
+
+[author]: https://github.com/Asim-Tahir
+[repo]: https://github.com/Asim-Tahir/github-copilot-cli.fish
+[license]: https://opensource.org/licenses/MIT
+[omf]: https://github.com/oh-my-fish/oh-my-fish
+[fisher]: https://github.com/jorgebucaran/fisher
+[license-badge]: https://img.shields.io/badge/license-MIT-007EC7.svg?style=flat-square

conf.d/github-copilot-cli.fish

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+# Fisher initialization
+# protected as omf also tries to run it.
+set -q fisher_path; or set -l fisher_path $__fish_config_dir
+if test -f $fisher_path/functions/_github-copilot-cli.init.fish
+  source $fisher_path/functions/_github-copilot-cli.init.fish
+  _github-copilot-cli.init
+end

functions/_github-copilot-cli.abbrs.fish

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+function _github-copilot-cli.abbrs -d "Initialize GitHub Copilot Command Line Interface(CLI) abbreviations"
+    abbr -a -g ghcs        gh copilot suggest
+    abbr -a -g ghce        gh copilot explain
+end

functions/_github-copilot-cli.init.fish

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+function _github-copilot-cli.init -d "Initialize GitHub Copilot Command Line Interface(CLI) plugin"
+  # Initialize GitHub Copilot CLI abbreviations
+  _github-copilot-cli.abbrs
+end

init.fish

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+# Oh My Fish initialization
+# $path is only defined for oh-my-fish. home-manager activates this plugin by
+# adding the full path of functions/ to fish_function_path, and then sourcing
+# init.fish, so let's skip sourcing _github-copilot-cli.init.fish before calling _github-copilot-cli.init.
+set -l _github_copilot_cli_init_path "$path/functions/_github-copilot-cli.init.fish"
+if [ -f "$_github_copilot_cli_init_path" ];
+    source "$_github_copilot_cli_init_path"
+end
+
+_github-copilot-cli.init