nvim: refactor luasnip as plugin

luasnip works better as a plugin and not a ftplugin

.config/nvim/ftplugin/go.lua

@@ -1,21 +1 @@
 vim.bo.expandtab = false
-
-local once = require("once")
-once.test_and_load("ft_go", function()
-    local luasnip = require("luasnip")
-    local s = luasnip.snippet
-    local t = luasnip.text_node
-    local cr = function() return t { "", "" } end
-    local i = luasnip.insert_node
-
-    luasnip.add_snippets("go", {
-        s("ie", {
-            t("if err != nil {"),
-            cr(),
-            t("\t"),
-            i(0),
-            cr(),
-            t("}"),
-        }),
-    })
-end)

.config/nvim/ftplugin/haskell.lua

@@ -3,10 +3,3 @@ opts.matchit_let_in()
 
 vim.bo.shiftwidth = 2
 vim.bo.expandtab = true
-
-local once = require("once")
-once.test_and_load("ft_haskell", function()
-    local luasnip = require("luasnip")
-    local haskell_snippets = require("haskell-snippets").all
-    luasnip.add_snippets("haskell", haskell_snippets, { key = "haskell" })
-end)

.config/nvim/ftplugin/typst.lua

@@ -2,40 +2,9 @@ vim.bo.shiftwidth = 2
 vim.bo.tabstop = 2
 vim.bo.textwidth = 100
 
-local once = require("once")
-
-once.test_and_load("ft_typst", function()
-    vim.keymap.set("n", "<leader>f", function()
-        local tw = vim.bo.textwidth
-        local saved = vim.fn.winsaveview()
-        vim.cmd('silent exec "%!typstyle -c ' .. tostring(tw) .. ' "')
-        vim.fn.winrestview(saved)
-    end, { desc = "ft(typst): Format with typstyle" })
-
-    do
-        local luasnip = require("luasnip")
-        local s = luasnip.snippet
-        local t = luasnip.text_node
-        local cr = function() return t { "", "" } end
-        local i = luasnip.insert_node
-        local f = luasnip.function_node
-
-        local function show_date_typst_entry() return os.date('"%Y-%m-%d %H:%M:%S"') end
-        luasnip.add_snippets("typst", {
-            s("entry", {
-                t("#entry("),
-                f(show_date_typst_entry),
-                t { ")[", "" },
-                t("  "),
-                i(0),
-                t { "", "]" },
-            }),
-            s("lang", {
-                t('#set text(lang: "'),
-                i(0),
-                t('")'),
-                cr(),
-            }),
-        })
-    end
-end)
+vim.keymap.set("n", "<leader>f", function()
+    local tw = vim.bo.textwidth
+    local saved = vim.fn.winsaveview()
+    vim.cmd('silent exec "%!typstyle -c ' .. tostring(tw) .. ' "')
+    vim.fn.winrestview(saved)
+end, { desc = "ft(typst): Format with typstyle" })