Nvim: restructure all plugins configuration

.config/nvim/after/available/peek.rc.lua

@@ -0,0 +1,34 @@
+-- default config:
+require('peek').setup({
+  auto_load = true,         -- whether to automatically load preview when
+                            -- entering another markdown buffer
+  close_on_bdelete = true,  -- close preview window on buffer delete
+
+  syntax = true,            -- enable syntax highlighting, affects performance
+
+  theme = 'dark',           -- 'dark' or 'light'
+
+  update_on_change = true,
+
+  -- relevant if update_on_change is true
+  throttle_at = 200000,     -- start throttling when file exceeds this
+                            -- amount of bytes in size
+  throttle_time = 'auto',   -- minimum amount of time in milliseconds
+                            -- that has to pass before starting new render
+})
+
+local peek = require('peek')
+
+vim.api.nvim_create_user_command('PeekOpen', function()
+  if not peek.is_open() and vim.bo[vim.api.nvim_get_current_buf()].filetype == 'markdown' then
+    vim.fn.system('i3-msg split horizontal')
+    peek.open()
+  end
+end, {})
+
+vim.api.nvim_create_user_command('PeekClose', function()
+  if peek.is_open() then
+    peek.close()
+    vim.fn.system('i3-msg move left')
+  end
+end, {})