Add dev Makefile; format all markdown with prettier

Adds a minimal Makefile wrapping the toolchain the way sneak's other
repos expose it:

- fmt        gofmt -w plus prettier (4-space tabs, proseWrap: always)
- fmt-check  fail if any Go or Markdown file is unformatted
- lint       golangci-lint run ./...
- test       go test ./...
- check      fmt-check + lint + test (the local pre-commit gate)

Running make fmt normalizes the four existing Markdown docs to the
shared prettier style (80-column proseWrap: always, aligned tables) —
a one-time reflow with no content change. The repo remains exempt from
the rest of the policy scaffold (no Dockerfile, CI, or REPO_POLICIES).

README.md

@@ -2,19 +2,19 @@
 
 [![License](https://img.shields.io/badge/license-BSD-blue.svg)](LICENSE.TXT)
 
-**Rogue** is the original dungeon-crawling adventure game that spawned an
-entire genre. This branch is a faithful Go port of Rogue 5.4.4: explore
-procedurally generated dungeons, fight monsters, collect treasure, and
-attempt to retrieve the Amulet of Yendor.
+**Rogue** is the original dungeon-crawling adventure game that spawned an entire
+genre. This branch is a faithful Go port of Rogue 5.4.4: explore procedurally
+generated dungeons, fight monsters, collect treasure, and attempt to retrieve
+the Amulet of Yendor.
 
-**Original authors:** Michael Toy, Ken Arnold, and Glenn Wichman
-(1980–1983, 1985, 1999).
+**Original authors:** Michael Toy, Ken Arnold, and Glenn Wichman (1980–1983,
+1985, 1999).
 
 The port is function-by-function faithful to the classic C sources — same
-dungeon generation (seed-compatible RNG), same combat math, same item
-tables, same messages. The C reference implementation lives on the
-`master` and `modern-rogue` branches; [ARCHITECTURE.md](ARCHITECTURE.md)
-documents both the original program structure and the design of this port.
+dungeon generation (seed-compatible RNG), same combat math, same item tables,
+same messages. The C reference implementation lives on the `master` and
+`modern-rogue` branches; [ARCHITECTURE.md](ARCHITECTURE.md) documents both the
+original program structure and the design of this port.
 
 ## Building and running
 
@@ -40,13 +40,12 @@ go build ./cmd/rogue
 
 Press `?` in game for the full list.
 
-- **arrows** or **h/j/k/l/y/u/b/n** — move (shift to run, ctrl to run
-  until adjacent)
+- **arrows** or **h/j/k/l/y/u/b/n** — move (shift to run, ctrl to run until
+  adjacent)
 - **`.`** rest, **`s`** search for hidden doors and traps
 - **`i`** inventory, **`,`** pick up, **`d`** drop
 - **`q`** quaff potion, **`r`** read scroll, **`e`** eat food
-- **`w`** wield weapon, **`W`** wear armor, **`P`**/**`R`** put on /
-  remove ring
+- **`w`** wield weapon, **`W`** wear armor, **`P`**/**`R`** put on / remove ring
 - **`t`** throw, **`z`** zap a wand, **`f`**/**`F`** fight
 - **`>`**/**`<`** take the stairs
 - **`S`** save, **`Q`** quit
@@ -61,8 +60,8 @@ export ROGUEOPTS="name=YourName,terse,jump,fruit=mango"
 ROGUE_WIZARD=1 SEED=12345 ./rogue
 ```
 
-The scoreboard is kept in `~/.rogue.scores`. Save files are Go gob
-snapshots and, as in the original, are deleted when restored.
+The scoreboard is kept in `~/.rogue.scores`. Save files are Go gob snapshots
+and, as in the original, are deleted when restored.
 
 ## Code layout
 
@@ -73,13 +72,13 @@ term/        tcell-backed terminal, replacing curses
 cmd/rogue/   the executable
 ```
 
-The engine package is fully headless-testable: `go test ./game/` runs
-scripted game sessions, dungeon-generation golden checks, and an RNG
-compatibility test against the original C generator.
+The engine package is fully headless-testable: `go test ./game/` runs scripted
+game sessions, dungeon-generation golden checks, and an RNG compatibility test
+against the original C generator.
 
 ## License
 
 BSD-style; see [LICENSE.TXT](LICENSE.TXT).
 
-Copyright (C) 1980-1983, 1985, 1999 Michael Toy, Ken Arnold and Glenn
-Wichman. All rights reserved.
+Copyright (C) 1980-1983, 1985, 1999 Michael Toy, Ken Arnold and Glenn Wichman.
+All rights reserved.