Update signcolumn, show diagnostics colored line numbers, remove

diagnostics signs from column. Remove tiny inline diagnostics and
re-enable virtual text with a circle icon instead of a box icon.
from c

nvim/init.lua

@@ -16,7 +16,7 @@ end
 -- Load keymaps before loading any plugins
 require("keymaps")
 
--- change and personalize native vim settings
+-- Change and personalize native vim settings
 vim.opt = require("vim_opt")
 
 -- Initialize Lazy package manager
@@ -40,6 +40,9 @@ require("dap/setup")
 -- See ":help vim.highlight.on_yank()"
 setup_yank_highlight()
 
+-- Change built in settings related to diagnostics
+require("diagnostics")
+
 --[[
 -- Annoyances in Neovim environment:
 -- 1. codelldb doesn't terminate C++ program after debugging.    : Don't know how to fix, have asked for help.