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>

tools/editors/jetbrains/src/main/kotlin/io/ludic/ide/LudicConfigurable.kt

@@ -37,11 +37,11 @@ class LudicConfigurable(private val project: Project) : Configurable {
         panel = FormBuilder.createFormBuilder()
             .addLabeledComponent(JBLabel("Language server (ludic-lsp):"), serverField, 1, false)
             .addComponentToRightColumn(
-                JBLabel("Leave empty to use build/ludic-lsp under the project, then PATH.")
+                JBLabel("Leave empty to use bin/ludic-lsp under the project, then PATH.")
             )
             .addLabeledComponent(JBLabel("Compiler (ludicc):"), compilerField, 1, false)
             .addComponentToRightColumn(
-                JBLabel("Used for authoritative diagnostics. Empty means build/ludicc.")
+                JBLabel("Used for authoritative diagnostics. Empty means bin/ludicc.")
             )
             .addComponent(diagnostics)
             .addLabeledComponent(JBLabel("Formatter indent:"), indent, 1, false)

tools/editors/jetbrains/src/main/kotlin/io/ludic/ide/LudicServer.kt

@@ -146,8 +146,8 @@ internal fun serverCommand(root: String?, configured: String): List<String>? {
 }
 
 /** Where the toolchain is looked for, relative to the project root. */
-internal val SERVER_SUBDIRS = listOf("build", "tools/build", "bin", ".")
-internal val COMPILER_SUBDIRS = listOf("build", "bin", ".")
+internal val SERVER_SUBDIRS = listOf("bin", "build", "tools/build", ".")
+internal val COMPILER_SUBDIRS = listOf("bin", "build", ".")
 
 class LudicLanguageServerFactory : LanguageServerFactory {
     override fun createConnectionProvider(project: Project): StreamConnectionProvider =

tools/editors/jetbrains/src/main/resources/META-INF/plugin.xml

@@ -15,7 +15,7 @@
       <li>Highlighting of <code>```ludic</code> fenced blocks in Markdown.</li>
     </ul>
     <p>Set the paths under <b>Settings &rarr; Languages &amp; Frameworks &rarr; Ludic</b>, or leave
-       them blank to use <code>build/ludic-lsp</code> and <code>build/ludicc</code> under the
+       them blank to use <code>bin/ludic-lsp</code> and <code>bin/ludicc</code> under the
        project root.</p>
     ]]></description>