Nvim: restructure all plugins configuration

.config/nvim/after/plugin/ufo.rc.lua

@@ -1,12 +0,0 @@
-vim.wo.foldcolumn = '1'
-vim.wo.foldlevel = 99 -- feel free to decrease the value
-vim.wo.foldenable = true
-
--- tell the sever the capability of foldingRange
-local capabilities = vim.lsp.protocol.make_client_capabilities()
-capabilities.textDocument.foldingRange = {
-    dynamicRegistration = false,
-    lineFoldingOnly = true
-}
-
---require('ufo').setup()

.config/nvim/after/plugin/ufo.rc.lua

@@ -0,0 +1 @@
+../available/ufo.rc.lua