Neovim and Tmux improvements

[nandalopes]

• style(nvim): group together colorschemes
• feat(nvim): allow local plugins
• fix(nvim): powerline extended symbols
• feat(nvim): OS specific keymaps
• style(nvim): align comments on plugin set
• refactor(tmux): many improvements

[nandalopes]

Tmux improvements:

• Highlight window name with purple bold font when zoomed
• Renumber windows
• Separate colorscheme from other styling settings
• Use none style attribute instead of nobold,noitalic,...
• Restore clear screen keybind mapped over by tmux-navigator
  • C-l changes pane
  • Prefix + C-l clear screen

Neovim improvements:

• Use nerdfonts powerline glyphs
• Source local plugins commands at plugins/main.vim, before plug#end()