Rename constructor to game.New(game.Params) per styleguide

NewGame(Config) becomes New(Params), and Restore takes Params too, so
the package's primary type gets the canonical New() constructor with a
named-field Params struct (styleguide points 139, 159). cmd/rogue and
all tests updated; ARCHITECTURE.md constructor references corrected.
Pure rename, suite green.

ARCHITECTURE.md

@@ -1076,7 +1076,7 @@ that `game` itself has no third-party imports:
 go.mod                        module git.eeqj.de/sneak/rgoue
 cmd/rogue/main.go             package main — flag parsing, constructs RogueGame, calls Run
 game/                         package game — the port, one .go file per .c file
-    game.go                   RogueGame struct, NewGame, Run  (main.c)
+    game.go                   RogueGame struct, New, Run      (main.c)
     rng.go                    seeded LCG                      (main.c: rnd/roll + RN macro)
     types.go                  Coord, Stats, flags, constants  (rogue.h)
     object.go                 Object type                     (rogue.h THING _o arm)
@@ -1120,7 +1120,7 @@ coherent, but everything is reachable from `g`.
 
 ```go
 // RogueGame is one complete game of Rogue: all state that was global in the
-// C implementation, plus the terminal it plays on. Construct with NewGame,
+// C implementation, plus the terminal it plays on. Construct with New,
 // then call Run.
 type RogueGame struct {
     // --- identity / RNG ---
@@ -1193,15 +1193,15 @@ The command.c/io.c/things.c file-statics become lowercase fields of `RogueGame`,
 ### Entrypoints
 
 ```go
-func NewGame(opts Config) *RogueGame   // Config: seed, name, ROGUEOPTS string, score path, wizard
-func (g *RogueGame) Run() error        // main.c main()+playit(): init tables, first level, daemons, loop
-func (g *RogueGame) command()          // one turn (command.c)
-func Restore(path string, opts Config) (*RogueGame, error)  // save.c restore()
+func New(params Params) *RogueGame      // Params: seed, name, ROGUEOPTS string, score path, wizard
+func (g *RogueGame) Run() error         // main.c main()+playit(): init tables, first level, daemons, loop
+func (g *RogueGame) command()           // one turn (command.c)
+func Restore(path string, params Params) (*RogueGame, error)  // save.c restore()
 ```
 
 `cmd/rogue/main.go` is a thin shell: flags (`-s` scores, `-d` death demo,
-save-file arg, `SEED`/`ROGUEOPTS` env), `NewGame(...)` or `Restore(...)`,
-`Run()`, exit code.
+save-file arg, `SEED`/`ROGUEOPTS` env), `New(...)` or `Restore(...)`, `Run()`,
+exit code.
 
 ## 4. Core types
 
@@ -1366,7 +1366,7 @@ type Room struct {
 tables that are never written after init** (the only permitted package-level
 data — they are ROM, not state): `monsterTable [26]MonsterKind` (name, carry %,
 flags, stats), `initDam` weapon table, base `objInfo` tables (copied into
-`RogueGame.Items` at NewGame so per-game mutation — probability resumming,
+`RogueGame.Items` at New so per-game mutation — probability resumming,
 `oi_know`, `oi_guess` — stays instance-local), `eLevels`, `rainbow`, `stones`,
 `woods`, `metals`, `sylls`, trap names, help text, `lvlMons`/`wandMons` spawn
 strings, `hNames`/`mNames` combat messages.
@@ -1634,6 +1634,6 @@ defers.
 - **Determinism test:** scripted input sequence against a fixed seed must
   produce identical final state across runs (guards hidden nondeterminism — map
   iteration, time dependence).
-- **Save round-trip:** NewGame → play N scripted turns → save → restore →
-  compare full state.
+- **Save round-trip:** New → play N scripted turns → save → restore → compare
+  full state.
 - `go vet` + `gofmt` clean at every commit.