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, 38 insertions, 0 deletions

diff --git a/tests/drivers/fuzz_wasm.js b/tests/drivers/fuzz_wasm.js
new file mode 100644
index 0000000..b0982d4
--- /dev/null
+++ b/tests/drivers/fuzz_wasm.js
@@ -0,0 +1,38 @@
+// Deterministic compiler/runtime/stdlib fuzzing through the WebAssembly host.
+// Usage: node tests/drivers/fuzz_wasm.js path/to/zc.wasm
+const fs = require('fs');
+const ZC = require('../../src/web/zc.js');
+
+let state = 0x5a17;
+function next() { state = (Math.imul(state, 1664525) + 1013904223) >>> 0; return state; }
+function expr(depth) {
+	if (!depth || next() % 4 === 0) { const n = next() % 10; return [String(n), n]; }
+	const [left, a] = expr(depth - 1), [right, b] = expr(depth - 1), op = ['+', '-', '*'][next() % 3];
+	return [`(${left} ${op} ${right})`, op === '+' ? a + b : op === '-' ? a - b : a * b];
+}
+function quote(s) { return '"' + s + '"'; }
+
+(async () => {
+	const lines = ['include std;', 'fn churn(n) { int i = 0; while (i < n) { { int* p = new(int); *p = i; } i++; } return 0; }', 'fn stable() { return 73; }', 'fn main() {', ' let base = live_objects();'];
+	const expected = [];
+	for (let i = 0; i < 128; i++) {
+		const [source, value] = expr(4);
+		lines.push(` put_n(${source}); put_c(32);`); expected.push(value);
+	}
+	for (let i = 0; i < 32; i++) {
+		const a = Array.from({ length: next() % 11 }, () => 'abc'[next() % 3]).join('');
+		const b = Array.from({ length: next() % 6 }, () => 'abc'[next() % 3]).join('');
+		lines.push(` put_n(Text.len(${quote(a)})); put_c(32); put_n(Text.eq(${quote(a)}, ${quote(b)})); put_c(32);`);
+		lines.push(` put_n(Text.starts(${quote(a)}, ${quote(b)})); put_c(32); put_n(Text.ends(${quote(a)}, ${quote(b)})); put_c(32); put_n(Text.find(${quote(a)}, ${quote(b)})); put_c(32);`);
+		lines.push(` put_n(Bytes.len(b${quote(a)})); put_c(32); put_n(Bytes.eq(b${quote(a)}, b${quote(b)})); put_c(32);`);
+		lines.push(` put_n(Bytes.starts(b${quote(a)}, b${quote(b)})); put_c(32); put_n(Bytes.ends(b${quote(a)}, b${quote(b)})); put_c(32); put_n(Bytes.find(b${quote(a)}, b${quote(b)})); put_c(32);`);
+		expected.push(a.length, Number(a === b), Number(a.startsWith(b)), Number(a.endsWith(b)), a.indexOf(b), a.length, Number(a === b), Number(a.startsWith(b)), Number(a.endsWith(b)), a.indexOf(b));
+	}
+	lines.push(' churn(300); gc(); put_n(live_objects() - base); put_c(32);', ' put_n(stable()); put_c(10);', ' return 0;', '}');
+	expected.push(0, 73);
+	const source = lines.join('\n') + '\n', want = expected.join(' ') + '\n';
+	const zc = await ZC.load(fs.readFileSync(process.argv[2] || 'src/web/zc.wasm'));
+	const result = await zc.run(source);
+	if (result.output !== want) throw new Error(`wasm fuzz mismatch\nexpected: ${want.slice(0, 180)}\nactual: ${result.output.slice(0, 180)}\nmessages: ${result.messages}`);
+	console.log('ok   wasm compiler/runtime/stdlib fuzz: 128 expressions, 300 scoped allocations and GC, and 32 Text/Bytes cases');
+})().catch(error => { console.error(error); process.exitCode = 1; });