Add example of the provided components

[vladimir-popov]

It would be nice to see how provided components look in readme. For example:

ex.spellcheck

vim.o.spell=true:   vim.o.spell=false:  

ex.cwd

pwd = /Users/dokwork/.local/share/nvim/lazy/lualine-ex:      

ex.git.branch

No git worktree	Worktree is commited	Worktree is changed

ex.lsp.single

No one lsp client:        lua_ls is active: 

ex.lsp.all

No one lsp client	Only lua_ls is run and active	Both lua_ls and vimls are run, but only vimls is active