[feat] ssh, vimrc, backup & other fixes

[feat] ssh, vimrc, backup & other fixes

* .scripts/ssh
- refactor the script
- gen option ed25519
- select public keys with dmenu
- select keys fingerprint md5 hash

* .vimrc
- add 2 functions detect trail and mixes spaces in statusline

* .scripts/gpg.sh
- create ed25519 key
- export all

.gitignore
.scripts/backup
.scripts/create_diff_git.sh
.scripts/find_word.sh
.scripts/install_arch.md
.scripts/pacman_base.txt
.scripts/unmount_drives.sh
.vim/comment.vim
.config/youtube-viewer/youtube-viewer.conf
.config/mutt/signatures/default