feat(tools): L10 ludic-fmt enforces a project's style

lint lines in package.ludic - one_statement, max_file_lines, max_function_lines,
max_comment_lines, max_header_lines, paths, baseline - checked by ludic-fmt --check
<files> and ludic-fmt --lint (the project), at the line; a baseline ratchet lets a
rule arrive in a codebase that breaks it (--init-baseline), lowered as it is fixed.
check-impl reads the alias declarations too (it had been blind to every namespace
L6 moved out of the compiler), and eight methods get their pages; a test holds the
formatter to keeping type arguments together (L5).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/language/time/time-now_us.md

@@ -0,0 +1,23 @@
+---
+id: time-now_us
+name: Time.now_us
+category: time
+kind: namespace-method
+tokens: Time.now_us
+sig: Time.now_us() -> long
+tip: A microsecond clock, for measuring.
+order: 7
+ns: Time
+member: now_us
+---
+
+Returns a steady microsecond count from the platform clock, for timing a piece of work - the difference between two readings is how long it took. It is not the game's time (that is <a href="time-now"><code>Time.now</code></a>) and it does not stop when the game is paused.
+
+```ludic
+program Timed {
+  entry {
+    let t0 = Time.now_us()
+    print(Time.now_us() - t0)
+  }
+}
+```

docs/language/time/time-sleep_us.md

@@ -0,0 +1,26 @@
+---
+id: time-sleep_us
+name: Time.sleep_us
+category: time
+kind: namespace-method
+tokens: Time.sleep_us
+sig: Time.sleep_us(us)
+tip: Waits this many microseconds.
+order: 8
+ns: Time
+member: sleep_us
+---
+
+Suspends the program for about `us` microseconds - a high-resolution wait, for pacing a loop to a frame rate. No operating system's sleep is exact, so a limiter sleeps most of the wait and spins the last of it.
+
+Parameters:
+- `us` — how long to wait, in microseconds (a `long`)
+
+```ludic
+program Paced {
+  entry {
+    Time.sleep_us(1000)
+    print(1)
+  }
+}
+```