feat(extras): blink (#4680)

## Description

Extra to use [blink.cmp](https://github.com/Saghen/blink.cmp) instead of
**nvim-cmp**.

## Todo

- [x] tokyonight suport
- [x] basic integration
- [ ] check / update all cmp sources
- [ ] copilot and others integration 
- [x] native lazydev source

## Limitations

There's no copilot source, so instead when enabling both blink and
copilot:
- blink ghost text is disabled
- copilot suggestions are enabled
- use `<tab>` to navigate snippets and accept copilot completions 

## Related Issue(s)

- https://github.com/LazyVim/LazyVim/discussions/4679

lua/lazyvim/plugins/extras/coding/blink.lua

@@ -0,0 +1,96 @@
+return {
+  {
+    "hrsh7th/nvim-cmp",
+    enabled = false,
+  },
+  {
+    "saghen/blink.cmp",
+    -- TODO: use release version
+    -- version = "*",
+    opts_extend = { "sources.completion.enabled_providers" },
+    dependencies = {
+      "rafamadriz/friendly-snippets",
+      -- add blink.compat to dependencies
+      -- { "saghen/blink.compat", opts = {} },
+    },
+    event = "InsertEnter",
+
+    ---@module 'blink.cmp'
+    ---@type blink.cmp.Config
+    opts = {
+      fuzzy = {
+        prebuilt_binaries = {
+          download = true,
+          force_version = "v0.5.0",
+        },
+      },
+      highlight = {
+        -- sets the fallback highlight groups to nvim-cmp's highlight groups
+        -- useful for when your theme doesn't support blink.cmp
+        -- will be removed in a future release, assuming themes add support
+        use_nvim_cmp_as_default = false,
+      },
+      -- set to 'mono' for 'Nerd Font Mono' or 'normal' for 'Nerd Font'
+      -- adjusts spacing to ensure icons are aligned
+      nerd_font_variant = "mono",
+      windows = {
+        autocomplete = {
+          draw = "reversed",
+        },
+        documentation = {
+          auto_show = true,
+        },
+        ghost_text = {
+          enabled = true,
+        },
+      },
+
+      -- experimental auto-brackets support
+      accept = { auto_brackets = { enabled = true } },
+
+      -- experimental signature help support
+      -- trigger = { signature_help = { enabled = true } }
+      sources = {
+        completion = {
+          -- remember to enable your providers here
+          enabled_providers = { "lsp", "path", "snippets", "buffer" },
+        },
+      },
+
+      keymap = {
+        preset = "enter",
+      },
+    },
+  },
+
+  -- add icons
+  {
+    "saghen/blink.cmp",
+    opts = function(_, opts)
+      opts.kind_icons = LazyVim.config.icons.kinds
+    end,
+  },
+
+  -- lazydev
+  {
+    "saghen/blink.cmp",
+    opts = {
+      sources = {
+        completion = {
+          -- add lazydev to your completion providers
+          enabled_providers = { "lazydev" },
+        },
+        providers = {
+          lsp = {
+            -- dont show LuaLS require statements when lazydev has items
+            fallback_for = { "lazydev" },
+          },
+          lazydev = {
+            name = "LazyDev",
+            module = "lazydev.integrations.blink",
+          },
+        },
+      },
+    },
+  },
+}

lua/lazyvim/plugins/extras/coding/copilot.lua

@@ -80,4 +80,44 @@ return {
       })
     end,
   },
+
+  {
+    "saghen/blink.cmp",
+    optional = true,
+    specs = {
+      {
+        "zbirenbaum/copilot.lua",
+        event = "InsertEnter",
+        opts = {
+          suggestion = {
+            enabled = true,
+            auto_trigger = true,
+            keymap = { accept = false },
+          },
+        },
+      },
+    },
+    opts = {
+      windows = {
+        ghost_text = {
+          enabled = false,
+        },
+      },
+      keymap = {
+        ["<Tab>"] = {
+          function(cmp)
+            if cmp.is_in_snippet() then
+              return cmp.accept()
+            elseif require("copilot.suggestion").is_visible() then
+              require("copilot.suggestion").accept()
+            else
+              return cmp.select_and_accept()
+            end
+          end,
+          "snippet_forward",
+          "fallback",
+        },
+      },
+    },
+  },
 }

lua/lazyvim/plugins/lsp/init.lua

@@ -184,11 +184,13 @@ return {
 
       local servers = opts.servers
       local has_cmp, cmp_nvim_lsp = pcall(require, "cmp_nvim_lsp")
+      local has_blink, blink = pcall(require, "blink.cmp")
       local capabilities = vim.tbl_deep_extend(
         "force",
         {},
         vim.lsp.protocol.make_client_capabilities(),
         has_cmp and cmp_nvim_lsp.default_capabilities() or {},
+        has_blink and blink.get_lsp_capabilities() or {},
         opts.capabilities or {}
       )
 

lua/lazyvim/plugins/xtras.lua

@@ -4,6 +4,7 @@ local prios = {
   ["lazyvim.plugins.extras.dap.core"] = 1,
   ["lazyvim.plugins.extras.ui.edgy"] = 2,
   ["lazyvim.plugins.extras.lang.typescript"] = 5,
+  ["lazyvim.plugins.extras.coding.blink"] = 5,
   ["lazyvim.plugins.extras.formatting.prettier"] = 10,
   -- default priority is 50
   ["lazyvim.plugins.extras.editor.aerial"] = 100,

lua/lazyvim/util/cmp.lua

@@ -71,9 +71,17 @@ function M.add_missing_snippet_docs(window)
 end
 
 function M.visible()
+  ---@module 'blink.cmp'
+  local blink = package.loaded["blink.cmp"]
+  if blink then
+    return blink.windows and blink.windows.autocomplete.win:is_open()
+  end
   ---@module 'cmp'
   local cmp = package.loaded["cmp"]
-  return cmp and cmp.core.view:visible()
+  if cmp then
+    return cmp.core.view:visible()
+  end
+  return false
 end
 
 -- This is a better implementation of `cmp.confirm`: