feat(plugin): addcustom snippet provider configuration

Added dedicated snippet provider with configurable search paths and extended filetype support for MDX, while replacing the legacy LuaSnip preset with the default preset and updating fuzzy settings.

- New Features
  - Introduced custom snippet provider loading snippets from `config/snippets`
  - Enabled MDX completion as markdown
- Enhancements
  - Switched snippet preset from `luasnip` to `default`
  - Updated fuzzy implementation to `prefer_rust`
  - Removed legacy LuaSnip loader calls

plugin/completion.lua

@@ -1,13 +1,12 @@
 add({
 	"saghen/blink.lib",
 	{ src = "saghen/blink.cmp", build = "cargo build --release" },
-	{ src = "L3MON4D3/LuaSnip", build = "make install_jsregexp" },
 	"rafamadriz/friendly-snippets",
 })
 
 require("blink.cmp").setup({
 	fuzzy = { implementation = "prefer_rust" },
-	snippets = { preset = "luasnip" },
+	snippets = { preset = "default" },
 	sources = {
 		default = function()
 			local type = vim.fn.getcmdtype()
@@ -15,6 +14,14 @@ require("blink.cmp").setup({
 			if type == ":" then return { "cmdline" } end
 			return { "lsp", "path", "snippets", "buffer" }
 		end,
+		providers = {
+			snippets = {
+				opts = {
+					search_paths = { vim.fn.stdpath("config") .. "/snippets" },
+					extended_filetypes = { mdx = { "markdown" } },
+				},
+			},
+		},
 	},
 
 	completion = {
@@ -70,10 +77,3 @@ require("blink.cmp").setup({
 	},
 })
 
-local luasnip = require("luasnip")
-require("luasnip.loaders.from_vscode").lazy_load()
-require("luasnip.loaders.from_vscode").lazy_load({
-	paths = { vim.fn.stdpath("config") .. "/snippets" },
-})
-
-luasnip.filetype_extend("mdx", { "markdown" })