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, 10 insertions, 7 deletions

diff --git a/tests/programs/tagenum.zc b/tests/programs/tagenum.zc
index f438c5b..013f191 100644
--- a/tests/programs/tagenum.zc
+++ b/tests/programs/tagenum.zc
@@ -1,3 +1,6 @@
+namespace;
+include rt;
+
 // tagged enums: a member can carry fields, a constructor builds it, and a
 // switch matches on the member and binds its fields
 enum shape { circle { int r; }, rect { int w; int h; }, dot };
@@ -15,12 +18,12 @@ fn main() {
 	shape* a = shape.circle(3);
 	shape* b = shape.rect(4, 5);
 	shape* c = shape.dot();
-	put_n(area(a)); put_c(32);
-	put_n(area(b)); put_c(32);
-	put_n(area(c)); put_c(32);
-	put_n(a.tag); put_c(32);
-	put_n(b.tag); put_c(32);
-	put_n(c.tag); put_c(10);
-	free(d*a); free(d*b); free(d*c);
+	rt.put_n(area(a)); rt.put_c(32);
+	rt.put_n(area(b)); rt.put_c(32);
+	rt.put_n(area(c)); rt.put_c(32);
+	rt.put_n(a.tag); rt.put_c(32);
+	rt.put_n(b.tag); rt.put_c(32);
+	rt.put_n(c.tag); rt.put_c(10);
+	rt.free(d*a); rt.free(d*b); rt.free(d*c);
 	return 0;
 }