feat(nvim): Markdown: QoL plugins and settings

- Link creation: autocommand to add <leader>ml shortcut for converting
  selected text to link
- Formatting: Use markdown-toc to format available TOC
- LSP: Add markdown-toc & markdownlint to Mason ensure_installed
- Plugin: render-markdown.nvim with pretty colors to make Obsidian-esk
  rendering
- Plugin: bullets.nvim for easier bullet-point operations (auto indent,
  auto increment numbers, etc.)
- Chore: Move all markdown plugins to lang-markdown.lua
- Plugin: img-clip.nvim: Paste screenshots from system-clipboard to
markdown (also create store the image as webp)
- Plugin: image.nvim: Show images across neovim. Renders image tags on
markdown

common/.config/nvim/lua/plugins/ui.lua

@@ -19,61 +19,6 @@ return {
 
     { "machakann/vim-highlightedyank" },
 
-    -- Render Markdown on Neovim
-    {
-        "MeanderingProgrammer/render-markdown.nvim",
-        opts = {
-            code = {
-                sign = false,
-                width = "block",
-                border = "thick",
-                position = "right",
-                language_name = false,
-                right_pad = 1,
-            },
-            heading = {
-                sign = false,
-                icons = {},
-            },
-            pipe_table = {
-                preset = "round",
-            },
-            indent = {
-                enabled = true,
-                skip_heading = true,
-            },
-        },
-        ft = { "markdown", "norg", "rmd", "org" },
-        config = function(_, opts)
-            require("render-markdown").setup(opts)
-            Snacks.toggle({
-                name = "Render Markdown",
-                get = function()
-                    return require("render-markdown.state").enabled
-                end,
-                set = function(enabled)
-                    local m = require("render-markdown")
-                    if enabled then
-                        m.enable()
-                    else
-                        m.disable()
-                    end
-                end,
-            }):map("<leader>cM")
-        end,
-    },
-
-    -- colorscheme
-    {
-        "projekt0n/github-nvim-theme",
-        cond = require("config.util").is_not_vscode(),
-        lazy = false,
-        priority = 1000,
-        config = function()
-            -- vim.cmd("colorscheme github_dark_dimmed")
-        end,
-    },
-
     {
         "catppuccin/nvim",
         name = "catppuccin",