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, 12 insertions, 9 deletions

diff --git a/tests/programs/allocfast.zc b/tests/programs/allocfast.zc
index 5ef2df2..d7b1d93 100644
--- a/tests/programs/allocfast.zc
+++ b/tests/programs/allocfast.zc
@@ -1,3 +1,6 @@
+namespace;
+include rt;
+
 // repeated allocations of a size known at compile time: new(T) of a struct of
 // numbers, and new(n) with a constant n. each pass of the loop makes an object
 // and frees it at the end of the block, so the allocator should hand back the
@@ -8,7 +11,7 @@ struct line { point* a; int len; };
 fn loop_leaf(int n) {
 	let total = 0;
 	for (int i = 0; i < n; i++) {
-		point* p = new(point);
+		point* p = rt.new(point);
 		total += p.x + p.y;		// zero from the allocator, every pass
 		p.x = i; p.y = 2;
 	}
@@ -17,7 +20,7 @@ fn loop_leaf(int n) {
 fn loop_words(int n) {
 	let total = 0, i = 0;
 	while (i < n) {
-		let w = new(6);
+		let w = rt.new(6);
 		total += w[0] + w[5];
 		w[0] = 7; w[5] = 9;
 		i++;
@@ -27,8 +30,8 @@ fn loop_words(int n) {
 fn loop_owner(int n) {
 	let i = 0, total = 0;
 	while (i < n) {
-		line* l = new(line);
-		l.a = new(point);
+		line* l = rt.new(line);
+		l.a = rt.new(point);
 		l.a.x = i;
 		total += l.a.x + l.len;
 		i++;
@@ -36,10 +39,10 @@ fn loop_owner(int n) {
 	return total;
 }
 fn main() {
-	let before = live_objects();
-	put_n(loop_leaf(50000)); put_c(' ');
-	put_n(loop_words(50000)); put_c(' ');
-	put_n(loop_owner(1000)); put_c(' ');
-	put_n(live_objects() - before); put_c(10);
+	let before = rt.live_objects();
+	rt.put_n(loop_leaf(50000)); rt.put_c(' ');
+	rt.put_n(loop_words(50000)); rt.put_c(' ');
+	rt.put_n(loop_owner(1000)); rt.put_c(' ');
+	rt.put_n(rt.live_objects() - before); rt.put_c(10);
 	return 0;
 }