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, 15 insertions, 12 deletions

diff --git a/tests/programs/umd.zc b/tests/programs/umd.zc
index fb1640e..e7ddc88 100644
--- a/tests/programs/umd.zc
+++ b/tests/programs/umd.zc
@@ -1,16 +1,19 @@
+namespace;
+include rt;
+
 // lists as [len, items...], items owned by the list
 .u mklist(n) {
-	let l = new(n + 1);
+	let l = rt.new(n + 1);
 	l[0] = 0;
 	return u*l;
 }
 fn push(.m l, .d item) { l[l[0] + 1] = d*item; l[0] = l[0] + 1; return 0; }
 fn sum(.m l) { let s = 0, i = 1; while (i <= l[0]) { s += l[i][0]; i++; } return s; }
-.u box(v) { let b = new(1); b[0] = v; return u*b; }
+.u box(v) { let b = rt.new(1); b[0] = v; return u*b; }
 fn consume(.d b) { return b[0]; }
 
 fn main() {
-	let base = live_objects();
+	let base = rt.live_objects();
 	{
 		let l = mklist(8);		// u from mklist arrives m*here
 		let i = 0;
@@ -20,10 +23,10 @@ fn main() {
 			push(l, b);
 			i++;
 		}
-		put_n(sum(l)); put_c(' ');
-		put_n(live_objects() - base); put_c(' ');	// list + 5 boxes
+		rt.put_n(sum(l)); rt.put_c(' ');
+		rt.put_n(rt.live_objects() - base); rt.put_c(' ');	// list + 5 boxes
 	}
-	put_n(live_objects() - base); put_c(' ');	// freed at the block's end, children too
+	rt.put_n(rt.live_objects() - base); rt.put_c(' ');	// freed at the block's end, children too
 
 	// u handed up one block by assignment, and as a block value
 	let outer;
@@ -33,18 +36,18 @@ fn main() {
 		outer = t;
 	}
 	let v = { let w = box(8); u*w };
-	put_n(outer[0] + v[0]); put_c(' ');
+	rt.put_n(outer[0] + v[0]); rt.put_c(' ');
 
 	// d given away to a callee
 	let g = box(99);
-	put_n(consume(d*g)); put_c(' ');
+	rt.put_n(consume(d*g)); rt.put_c(' ');
 
 	// containers: child takes its parent's tag
-	let p = new(2), c = new(1);
+	let p = rt.new(2), c = rt.new(1);
 	c[0] = 5;
 	p[0] = c;
-	p[1] = new(3);
-	put_n(p[0][0]); put_c(' ');
-	put_n(live_objects() - base); put_c(10);
+	p[1] = rt.new(3);
+	rt.put_n(p[0][0]); rt.put_c(' ');
+	rt.put_n(rt.live_objects() - base); rt.put_c(10);
 	return 0;
 }