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/misc.zc b/tests/programs/misc.zc
index 530322a..2b0f0c2 100644
--- a/tests/programs/misc.zc
+++ b/tests/programs/misc.zc
@@ -1,15 +1,18 @@
+namespace;
+include rt, run;
+
 // ct { ... } runs a block while compiling and leaves its result as a constant
 immediate fn ct() {
 	let q, v;
-	next();
-	q = grab();
-	v = eval(q);
-	free(d*q);
-	lit(v);
+	run.next();
+	q = run.grab();
+	v = run.eval(q);
+	rt.free(d*q);
+	run.lit(v);
 	return 0;
 }
 // teach the asm syntax that p means out, like the old repl demo
-immediate fn teach() { next(); mnem[12] = 'p'; return 0; }
+immediate fn teach() { run.next(); run.mnem[12] = 'p'; return 0; }
 teach
 
 fn countdown() {
@@ -17,11 +20,11 @@ fn countdown() {
 	return 0;
 }
 fn main() {
-	put_n(ct { let i = 0, s = 0; while (i < 10) { s += i; i++; } return s; }); put_c(10);
+	rt.put_n(ct { let i = 0, s = 0; while (i < 10) { s += i; i++; } return s; }); rt.put_c(10);
 	countdown();
-	put_s(lazy()); put_c(10);
+	rt.put_s(lazy()); rt.put_c(10);
 	return 0;
 }
 // the analyzer is off from here on
 unchecked;
-fn lazy() { let p = new(3); p[0] = 'o'; p[1] = 'k'; return p; }
+fn lazy() { let p = rt.new(3); p[0] = 'o'; p[1] = 'k'; return p; }