Rewrite entire plugin management system

- This encapsulates all plugin related functionalities into the plugins/
  folder (and pluginconfig/) instead of relying on utility file.
- It also renames utility/plugins.lua to a more sensible
  plugins/packer.lua as it actually only applies for packer plugin
  manager.
- The plugins.lua file is now split into 2 files, first holding the list
  of all plugins plugins/plugin_list.lua and second one holding the
  logic of bootstrapping and running startup on packer.

home/.config/nvim/lua/utility/plugins.lua

@@ -1,122 +0,0 @@
-local vim = require("vim")
-local cmd = vim.cmd
-local api = vim.api
-local fn = vim.fn
-
--- This module contains several functions regarding packer plugin manager
--- Most notably the get_plugin_file and packer_setup fucntions
-local M = {}
-
--- Drectory containing the individual plugin configuration files.
--- File to hold the compiled packer binary
-M.packer_compiled_path = fn.stdpath("config") .. "plugin/packer_compiled.lua"
-
--- Return the line (string) to be executed with lua that loads in given plugin file.
--- This is useful for the `config` or `setup` parameters of packer's use to either
--- source `.vim` files, or require `.lua` files.
--- Expects a `plugin_file` which is a relative path from the `plugin_directory` folder.
-function M.get_plugin_file(plugin_file, plugin_directory)
-    local filename, extension = plugin_file:match("^(.+)(%..+)$")
-    if (extension == ".vim") then
-        local source_line = string.format('source "%s/%s"', plugin_directory, plugin_file)
-        return string.format("vim.fn.execute('%s')", source_line)
-    else
-        return string.format('require("%s/%s")', plugin_directory, filename)
-    end
-end
-
--- Download packer plugin manager in case it isn't already installed
-function M.packer_bootstrap()
-    local first_install = false
-    local present, packer = pcall(require, "packer")
-    if not present then
-        local packer_install_path = fn.stdpath("data") .. "/site/pack/packer/start/packer.nvim"
-        print("Clonning pakcer plugin manager, please wait...")
-        -- First remove the directory in case it already exists but packer isn't present
-        fn.delete(packer_install_path, "rf")
-        fn.system({
-            "git", "clone", "--depth", "1",
-            "https://github.com/wbthomason/packer.nvim",
-            packer_install_path
-        })
-
-        -- Make sure packer was installed properly
-        cmd("packadd packer.nvim")
-        present, packer = pcall(require, "packer")
-
-        if present then
-            print("Packer clonned successfully.")
-            first_install = true
-        else
-            print("Couldn't clone packer! Packer path: " .. packer_install_path .. "\n" .. packer)
-        end
-    end
-
-    return { present = present, first_install = first_install, packer = packer }
-end
-
--- Initialize packer with our desired configuration
--- If packer isn't instaleld, this also performs the installation
-function M.packer_init()
-    local details = M.packer_bootstrap()
-    -- Only continue if we actually managed to install packer
-    if not details.present then
-        return details
-    end
-
-    details.packer.init({
-        display = {
-            open_fn = function()
-                return require('packer.util').float({ border = "rounded" })
-            end,
-            prompt_border = "rounded",
-        },
-        git = {
-            -- Timeout for git clones in seconds
-            clone_timeout = 600,
-        },
-        profile = {
-            enable = true,
-            -- The time that a pluign's load time must surpass for it to be included
-            -- in the profile (in miliseconds)
-            threshold = 1,
-        },
-        compile_path = M.packer_compiled_path,
-    })
-
-    return details
-end
-
--- Run packer's setup function and define all of the used plugins
--- Expects table/list of tables holding the individual plugin settings
-function M.packer_setup(plugin_configs)
-    local details = M.packer_init()
-    if not details.present then
-        return false
-    end
-
-    local packer = details.packer
-    local use = packer.use
-    local first_install = details.first_install
-
-    -- Make sure to add packer here, even if it's opt
-    api.nvim_command("packadd packer.nvim")
-
-    return packer.startup(function()
-        -- We always want to let packer manage itself
-        use("wbthomason/packer.nvim")
-
-        -- Load the obtained plugins (in any)
-        if plugin_configs and not vim.tbl_isempty(plugin_configs) then
-            for _, plugin in pairs(plugin_configs) do
-                use(plugin)
-            end
-        end
-
-        if first_install then
-            packer.sync()
-        end
-    end)
-end
-
-return M