fix(neovim): LSP, Formatter, Linter all in their places

- Formatter: Don't need both prettier & prettierd. Only use prettierd
- Formatter: markdown-toc is LSP not formatter
- Formatter: shellharden isn't formatter
- Formatter: Only shfmt for shell formatting
- Formatter: Don't need prettier to format yaml
- Linter: codespell on all buffers
- Install script: Remove prettier & shellharden (its useless with bashls)
- LSP: markdownlint, prettier, shellcheck, shellharden, shfmt aren't LSP

common/.config/nvim/lua/core/lsp.lua

@@ -4,6 +4,7 @@
 -- Step 2: Append the LSP server name in the below array ("newlsp")
 -- Step 3: Create file ("newlsp.lua") in ../../lsp/
 -- Step 4: Return a lua table containing required lsp config in it
+-- NOTE: Only LSPs here, NOT linters or formatter
 vim.lsp.enable({
     "bashls",
     "cssls",
@@ -12,13 +13,8 @@ vim.lsp.enable({
     "html",
     "jsonls",
     "lua_ls",
-    "markdownlint",
     "marksman",
-    "prettier",
     "pylsp",
-    "shellcheck",
-    "shellharden",
-    "shfmt",
     "taplo",
     "trivy",
     "ts_ls",