feat(stdlib): namespaced standard library (issue #2)

Implement the bulk of the namespaced-stdlib proposal (workshopsoft/ludic#2):
156 namespace methods across Math, Text, List, Ease, Collide, World, Net,
Sys, Save, Mem, extended Screen, Color functions, extended Random, and Time.
All deterministic fixed-point; self-hosting (C-free bootstrap fixpoint holds).

Compiler (selfhost/):
- Math.*: sqrt/sin/cos/tan/atan2/asin/acos (fixed-point runtime prelude —
  bit-by-bit isqrt, 256-entry interpolated sine table, Ross atan2), plus
  hypot/dist/dist2/deg_to_rad/rad_to_deg/posmod/wrap/ping_pong/snapped/
  move_toward/smoothstep/lerp/remap/sign/floor/ceil/round.
- Text.* (complete): upper/lower/trim/repeat/pad, split/join/replace,
  and the libc-backed queries.
- List.* (complete): insert/remove_at/remove/sort plus the earlier ops.
- Ease.* (in/out/in_out/back/bounce) and Collide.* (rects/point_rect/
  circles/rect_circle).
- Phase 3: World/Net/Sys/Save namespaced over the bare builtins (byte-
  identical IR) and Mem.* (bytes/words/copy/fill/peek/poke).
- Screen.* extended (line/circle/fill_circle/triangle/fill_triangle via new
  runtime primitives; sprite/sprite_scaled aliases), Color.* functions,
  Random.* (value/int/sign), Time.* (frame/delta/elapsed/now — new
  game-loop frame counter).
- Fix a lexer bug: fixed-point literals with >4 fractional digits overflowed.

Docs & tooling:
- 129 new per-symbol doc pages; gen.py made data-driven (namespaces
  discovered from the docs, no hardcoded list); new check-impl.py enforces
  that every implemented namespace method / keyword / type / phase has a
  doc page, wired into `x test-tools`. Document the previously-undocumented
  keywords (break/continue/where/entry/new/public + and/or/not tokens).
- LSP: namespaced signature help (ns_method_sig) covering every namespace.

Tests: 12 new self-host/regression tests + a golden render for the drawing
primitives. All suites green (selfhost 21, regression 45, tools 29).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/language/net/_section.md

@@ -0,0 +1,7 @@
+---
+id: net
+title: Net
+order: 6
+---
+
+The low-level networking seam — send and poll datagrams, serialize and apply entity state, and read ownership and role. Offline these collapse to single-player defaults.

docs/language/net/net-apply.md

@@ -0,0 +1,14 @@
+---
+id: net-apply
+name: Net.apply
+category: net
+kind: namespace-method
+tokens: Net.apply
+sig: Net.apply(entity, buf) -> int
+tip: Apply serialized state to an entity.
+order: 3
+ns: Net
+member: apply
+---
+
+Reads synced fields from <code>buf</code> into <code>entity</code> — the inverse of <code>Net.serialize</code>.

docs/language/net/net-is_owner.md

@@ -0,0 +1,14 @@
+---
+id: net-is_owner
+name: Net.is_owner
+category: net
+kind: namespace-method
+tokens: Net.is_owner
+sig: Net.is_owner(entity) -> bool
+tip: Does this peer own the entity?
+order: 7
+ns: Net
+member: is_owner
+---
+
+Returns true when this peer owns <code>entity</code> — <code>owner(entity) == local_id()</code>.

docs/language/net/net-is_server.md

@@ -0,0 +1,14 @@
+---
+id: net-is_server
+name: Net.is_server
+category: net
+kind: namespace-method
+tokens: Net.is_server
+sig: Net.is_server() -> bool
+tip: Is this peer the server?
+order: 6
+ns: Net
+member: is_server
+---
+
+Returns true on the authoritative peer. Offline it is true, so server-only guards run in single-player.

docs/language/net/net-local_id.md

@@ -0,0 +1,14 @@
+---
+id: net-local_id
+name: Net.local_id
+category: net
+kind: namespace-method
+tokens: Net.local_id
+sig: Net.local_id() -> int
+tip: This peer's own id.
+order: 8
+ns: Net
+member: local_id
+---
+
+Returns the network id of the local peer.

docs/language/net/net-owner.md

@@ -0,0 +1,14 @@
+---
+id: net-owner
+name: Net.owner
+category: net
+kind: namespace-method
+tokens: Net.owner
+sig: Net.owner(entity) -> int
+tip: The peer that owns an entity.
+order: 4
+ns: Net
+member: owner
+---
+
+Returns the peer id that owns <code>entity</code>'s <code>@Owned</code> state.

docs/language/net/net-poll.md

@@ -0,0 +1,14 @@
+---
+id: net-poll
+name: Net.poll
+category: net
+kind: namespace-method
+tokens: Net.poll
+sig: Net.poll(buf, cap) -> int
+tip: Read an inbound datagram.
+order: 1
+ns: Net
+member: poll
+---
+
+Reads up to <code>cap</code> bytes of the next inbound datagram into <code>buf</code> and returns the byte count, or zero when none is waiting.

docs/language/net/net-send.md

@@ -0,0 +1,14 @@
+---
+id: net-send
+name: Net.send
+category: net
+kind: namespace-method
+tokens: Net.send
+sig: Net.send(peer, buf, len) -> void
+tip: Put a datagram on the wire.
+order: 0
+ns: Net
+member: send
+---
+
+Sends the first <code>len</code> bytes of <code>buf</code> to <code>peer</code>. Absent a real socket it uses the built-in loopback, so offline code still runs.

docs/language/net/net-serialize.md

@@ -0,0 +1,14 @@
+---
+id: net-serialize
+name: Net.serialize
+category: net
+kind: namespace-method
+tokens: Net.serialize
+sig: Net.serialize(entity, buf) -> int
+tip: Serialize an entity's synced state.
+order: 2
+ns: Net
+member: serialize
+---
+
+Writes the <code>@Sync</code> fields of <code>entity</code> into <code>buf</code> and returns the byte count, for sending over the wire.

docs/language/net/net-set_owner.md

@@ -0,0 +1,14 @@
+---
+id: net-set_owner
+name: Net.set_owner
+category: net
+kind: namespace-method
+tokens: Net.set_owner
+sig: Net.set_owner(entity, peer) -> void
+tip: Assign ownership of an entity.
+order: 5
+ns: Net
+member: set_owner
+---
+
+Sets the owning peer of <code>entity</code> to <code>peer</code>.