Use "require" in textutils

This avoids us having to support requireless environments inside
cc.strings.

I do kinda wonder if os.loadAPI-loaded files should also have their own
shared "require", just so we're not loading 10 copies of cc.expect.

projects/core/src/main/resources/data/computercraft/lua/rom/apis/textutils.lua

@@ -7,9 +7,13 @@
 -- @module textutils
 -- @since 1.2
 
-local expect = dofile("rom/modules/main/cc/expect.lua")
+local pgk_env = setmetatable({}, { __index = _ENV })
+pgk_env.require = dofile("rom/modules/main/cc/require.lua").make(pgk_env, "rom/modules/main")
+local require = pgk_env.require
+
+local expect = require("cc.expect")
 local expect, field = expect.expect, expect.field
-local wrap = dofile("rom/modules/main/cc/strings.lua").wrap
+local wrap = require("cc.strings").wrap
 
 --- Slowly writes string text at current cursor position,
 -- character-by-character.

projects/core/src/main/resources/data/computercraft/lua/rom/modules/main/cc/expect.lua

@@ -118,8 +118,8 @@ end
 --- Expect a number to be within a specific range.
 --
 -- @tparam number num The value to check.
--- @tparam number min The minimum value, if nil then `-math.huge` is used.
--- @tparam number max The maximum value, if nil then `math.huge` is used.
+-- @tparam[opt=-math.huge] number min The minimum value.
+-- @tparam[opt=math.huge] number max The maximum value.
 -- @return The given `value`.
 -- @throws If the value is outside of the allowed range.
 -- @since 1.96.0

projects/core/src/main/resources/data/computercraft/lua/rom/modules/main/cc/strings.lua

@@ -8,7 +8,7 @@
 -- @since 1.95.0
 -- @see textutils For additional string related utilities.
 
-local expect = (require and require("cc.expect") or dofile("rom/modules/main/cc/expect.lua")).expect
+local expect = require("cc.expect").expect
 
 --[[- Wraps a block of text, so that each line fits within the given width.