bug: docs/hover doesn't handle markdown link escape sequence.

[Bowser1704]

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• I have searched the existing issues of noice.nvim
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Neovim version (nvim -v)

v0.9.0

Operating system/version

Ubuntu 20.04.4 LTS

Describe the bug

When I hover a function which document has link, the highlight doesn't handle it.

Its filetype is noice, when I set ft=lsp_markdown, It works.

It shows the default hover window when I disable noice.nvim.

Run checkhealth noice:

==============================================================================
noice: require("noice.health").check()

noice.nvim ~
- OK **Neovim** >= 0.8.0
- OK Not running inside **Neovide**
- OK You're using a GUI that should work ok
- OK **vim.go.lazyredraw** is not enabled
- OK **nvim-notify** is installed
- OK **TreeSitter vim** parser is installed
- OK **TreeSitter regex** parser is installed
- OK **TreeSitter lua** parser is installed
- OK **TreeSitter bash** parser is installed
- OK **TreeSitter markdown** parser is installed
- OK **TreeSitter markdown_inline** parser is installed
- OK `vim.notify` is set to **Noice**
- OK `vim.lsp.handlers["textDocument/hover"]` is set to **Noice**
- OK `vim.lsp.handlers["textDocument/signatureHelp"]` is set to **Noice**
- OK `vim.lsp.handlers["window/showMessage"]` is set to **Noice**
- OK `vim.lsp.util.convert_input_to_markdown_lines` is set to **Noice**
- OK `vim.lsp.util.stylize_markdown` is set to **Noice**

Steps To Reproduce

1. Hover the function which document has link.

Expected Behavior

The highlight function will remove escape sequences.

Repro

{
    "folke/noice.nvim",
    event = "VeryLazy",
    dependencies = {
      -- which key integration
      {
        "folke/which-key.nvim",
        opts = function(_, opts)
          if require("lazyvim.util").has("noice.nvim") then
            opts.defaults["<leader>sn"] = { name = "+noice" }
          end
        end,
      },
    },
    opts = {
      lsp = {
        override = {
          ["vim.lsp.util.convert_input_to_markdown_lines"] = true,
          ["vim.lsp.util.stylize_markdown"] = true,
          ["cmp.entry.get_documentation"] = false,
        },
        signature = {
          enabled = true,
          auto_open = {
            luasnip = true,
          },
        },
      },
      presets = {
        bottom_search = true,
        command_palette = true,
        lsp_doc_border = true, -- add a border to hover docs and signature help
      },
    },
    -- stylua: ignore
    keys = {
      { "<c-f>", function() if not require("noice.lsp").scroll(4) then return "<c-f>" end end, silent = true, expr = true, desc = "Scroll forward", mode = {"i", "n", "s"} },
      { "<c-b>", function() if not require("noice.lsp").scroll(-4) then return "<c-b>" end end, silent = true, expr = true, desc = "Scroll backward", mode = {"i", "n", "s"}},
    },
  },

[Bowser1704]

@folke It seems that miss / charater in markdown special chars fixed by a7246aa is not the root cause.

The special chars in markdown are "\\`*_{}[]()#+-.!", so it's necessary to conceal only these chars. However, it also adds escape to this non-special chars "\"/<>&=;':" to the hover documentation, when I enable noice.nvim. So it resulting in a weird ui.

And the workaround should be define these special chars to local chars = "\\`*_{}[]()#+-.!\"/<>&=;':", but I don't think this is a elegant solution.

[Bowser1704]

before:

after: