refactor: address emmylua diagnostics

lua/core/commands.lua

@@ -11,7 +11,7 @@ vim.api.nvim_create_user_command("PluginUnwatch", function()
 end, { desc = "Stop watching plugin configs" })
 
 vim.api.nvim_create_user_command("PluginReload", function(opts)
-    require("pack").reload(opts.args)
+    require("pack").reload_plugin(opts.args)
 end, {
     nargs = 1,
     complete = function(lead)

lua/core/keymap.lua

@@ -58,9 +58,11 @@ local function delete_buffer(force)
     if #buffers < 2 then
         return
     end
+    local b1 = assert(buffers[1])
+    local b2 = assert(buffers[2])
 
-    local current = tonumber(buffers[1]:match("^%s*(%d+)"))
-    local previous = tonumber(buffers[2]:match("^%s*(%d+)"))
+    local current = tonumber(b1:match("^%s*(%d+)")) --[[@as integer?]]
+    local previous = tonumber(b2:match("^%s*(%d+)")) --[[@as integer?]]
 
     if not current or not previous then
         return

lua/core/options.lua

@@ -26,6 +26,7 @@ vim.opt.foldlevel = 99
 vim.opt.foldlevelstart = 99
 vim.opt.foldmethod = "indent"
 vim.opt.foldignore = ""
+---@diagnostic disable-next-line: assign-type-mismatch
 vim.opt.completeopt = {
     "menu",
     "menuone",