feat: grow memory limits, add icon/actor libraries, overhaul LSP diagnostics

Compiler and VM
- make every memory map limit dynamic and adjustable at both build time and
  runtime, including compiler tables, stacks, and every execution region
- reserve and grow tables, operand and return stacks, frame segments, and
  image-building output without relocating live code or globals
- rename i/o and string helpers consistently (puts -> put_s, putn -> put_n,
  scat -> cat_s) across compiler, runtime, examples, tests, and docs
- recast and consume values assigned to globals from inside functions
- allow fixed and const together, add typed closure returns (fn:t(...)),
  multi-include syntax (include rt, run, core;), and recurse type inference
- never infer string literals as word, anywhere, as argument, variable, or
  return type
- draft docs/BORROW.md: a borrow checker less intrusive than Rust's but more
  intelligent

LSP and editor integration
- require explicit includes and give every toolchain area its own namespace
  (rt, lsp, run, core)
- hover for built-in types, inferred types, values known at hover time, array
  and pointer lifetime/size, library names in include statements, and inferred
  lifetimes with explanations
- honor /* */ comments as documentation for variables and arguments, and stop
  misattributing section headers or trailing comments as variable hints
- stream diagnostics and cancel stale requests on change
- jump to definition and references, including cross-file
- quick fixes with automatic library import, and namespace completion

Hints and diagnostics
- render hints as blue squigglies by default, with hints on/small/off per file
- suppress magic-number hints via a preceding /* */ comment, and say so
- warn on unused arguments; allow multiple _ discards in parameters, pattern
  matching, and tagged enums, warning if a _ is actually used
- rewrite hint and comment prose in professional compiler-doc register

Libraries
- add icon.zc: run-time self-modification, find/replace syntax, type and block
  edits, and step-through inspection of locals and globals
- add actor.zc: async actors with Actor<I,O>, implicit this, spawn/recv/send,
  injected into the compiler machinery at include time rather than built in

Tooling and docs
- reorganize sources, tests, and designs into subdirectories
- unify windows entry points in tinyvm.bat and add a matching tinyvm.sh
- add --help across the toolchain
- polish the learning guide, stdlib docs, and design notes

Tests
- add accept, reject, and regression coverage across the compiler, LSP,
- runtime, icon, actors, threads, formatting, and the toolchain contracts,
  plus fuzzers and property tests

1 files changed, 2 insertions, 2 deletions

diff --git a/src/tools/zcc b/src/tools/zcc
index 19904ea..3fb8f0c 100755
--- a/src/tools/zcc
+++ b/src/tools/zcc
@@ -22,7 +22,7 @@ while [ $# -gt 0 ]; do
 	case "$1" in
 		-o) [ $# -ge 2 ] || { echo "zcc: -o needs a name" >&2; exit 2; }; out="$2"; shift 2 ;;
 		-k) keep=1; shift ;;
-		-h|--help) sed -n '2,15p' "$0"; exit 0 ;;
+		-h|--help) printf '%s\n' 'usage: src/tools/zcc [-o OUT] [-k] FILE.zc' 'compiles a source file into a standalone binary; links statically where supported.' 'options:' '  -o OUT      output binary path; defaults to the source basename without .zc' '  -k          keep the temporary build directory' '  --help, -h  show this help and exit' 'environment: CC selects the c compiler; CFLAGS adds compiler flags.'; exit 0 ;;
 		-*) echo "zcc: unknown option $1" >&2; exit 2 ;;
 		*) break ;;
 	esac
@@ -49,6 +49,6 @@ if ! printf 'int main(void){return 0;}\n' | $CC -x c -static -o "$work/probe" -
 	static=""
 	echo "zcc: this toolchain cannot link -static; the binary is dynamic" >&2
 fi
-$CC -O2 -w -fwrapv ${CFLAGS:-} $static "$work/run/micro.c" "$work/run/port_linux.c" \
+$CC -O2 -w -fwrapv -pthread -DZY_THREADS ${CFLAGS:-} $static "$work/run/micro.c" "$work/run/port_linux.c" \
 	-I"$work/run" -o "$out"
 echo "zcc: wrote $out ($(wc -c < "$out" | tr -d ' ') bytes)"