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, 28 insertions, 25 deletions

diff --git a/tests/programs/meta.zc b/tests/programs/meta.zc
index 6afdf36..57c5d5a 100644
--- a/tests/programs/meta.zc
+++ b/tests/programs/meta.zc
@@ -1,43 +1,46 @@
+namespace;
+include rt, run;
+
 fn ipow(a, b) { let r = 1; while (b > 0) { r *= a; b--; } return r; }
 // a parse word that adds an operator to the compiler's tables
-immediate fn pow_op() { next(); add_binop("**", 11, "ipow c"); return 0; }
+immediate fn pow_op() { run.next(); run.add_binop("**", 11, "ipow c"); return 0; }
 pow_op
 
 // unless (cond) stmt: a parse word that emits code itself
 immediate fn unless() {
 	let a;
-	next();
-	expect(intern("(")); rval(); plainuse(expr()); rval(); expect(intern(")"));
-	emitseq(useq[0], ulen[0]);	// not
-	a = hole(); op(O_JZ);		// skip the body when the condition was true
-	substmt();
-	setlit(a, here);
+	run.next();
+	run.expect(run.intern("(")); run.rval(); run.plainuse(run.expr()); run.rval(); run.expect(run.intern(")"));
+	run.emitseq(run.useq[0], run.ulen[0]);	// not
+	a = run.hole(); run.op(run.O_JZ);		// skip the body when the condition was true
+	run.substmt();
+	run.setlit(a, run.here);
 	return 0;
 }
 // repeat N { body }: a macro, built from token lists
 immediate fn repeat() {
 	let n, body, i = 0;
-	next(); n = tv; next();
-	body = grab();
-	while (i < n) { feed(qdup(body)); i++; }
-	free(d*body);
+	run.next(); n = run.tv; run.next();
+	body = run.grab();
+	while (i < n) { run.feed(run.qdup(body)); i++; }
+	rt.free(d*body);
 	return 0;
 }
 fn main() {
-	put_n(2 ** 10); put_c(' '); put_n(3 + 2 ** 3 * 2); put_c(10);
-	unless (1 > 2) put_s("unless ok\n");
-	unless (2 > 1) put_s("wrong\n");
-	repeat 3 { put_c('r'); }
-	put_c(10);
-	let q = quote { put_n(40 + 2); put_c(10); return 7; };
-	put_n(q[0]); put_c(' ');
-	put_n(eval(q)); put_c(10);
-	let f = compile(q);
-	put_n(f()); put_c(10);
-	free(d*q);
+	rt.put_n(2 ** 10); rt.put_c(' '); rt.put_n(3 + 2 ** 3 * 2); rt.put_c(10);
+	unless (1 > 2) rt.put_s("unless ok\n");
+	unless (2 > 1) rt.put_s("wrong\n");
+	repeat 3 { rt.put_c('r'); }
+	rt.put_c(10);
+	let q = quote { rt.put_n(40 + 2); rt.put_c(10); return 7; };
+	rt.put_n(q[0]); rt.put_c(' ');
+	rt.put_n(run.eval(q)); rt.put_c(10);
+	let f = run.compile(q);
+	rt.put_n(f()); rt.put_c(10);
+	rt.free(d*q);
 	let defs = quote { fn sq(x) { return x * x; } };
-	load(defs);
-	free(d*defs);
-	put_n(evals("return sq(12);")); put_c(10);
+	run.load(defs);
+	rt.free(d*defs);
+	rt.put_n(run.evals("return sq(12);")); rt.put_c(10);
 	return 0;
 }