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, 19 insertions, 16 deletions

diff --git a/tests/programs/bstr_io.zc b/tests/programs/bstr_io.zc
index 9cf7ca9..8b1f2af 100644
--- a/tests/programs/bstr_io.zc
+++ b/tests/programs/bstr_io.zc
@@ -1,22 +1,25 @@
+namespace;
+include rt;
+
 fn main() {
 	let path = b"/tmp/zc-bstr.txt";
 	let msg = b"byte-io";
-	let fd = bopen(path, 1);
-	let n = bwrite(fd, msg, len_s(msg));
-	syscall(SYS_CLOSE, fd, 0, 0);
-	fd = bopen(path, 0);
-	let buf = new_s(7);
-	let g = bread(fd, buf, 7);
-	syscall(SYS_CLOSE, fd, 0, 0);
+	let fd = rt.bopen(path, 1);
+	let n = rt.bwrite(fd, msg, rt.len_s(msg));
+	rt.syscall(rt.SYS_CLOSE, fd, 0, 0);
+	fd = rt.bopen(path, 0);
+	let buf = rt.new_s(7);
+	let g = rt.bread(fd, buf, 7);
+	rt.syscall(rt.SYS_CLOSE, fd, 0, 0);
 	let name = b"ZC_BSTR";
-	let envb = new_s(16);
-	let k = bgetenv(name, envb, 16);
-	put_s(buf); put_c(32);
-	put_n(n); put_c(32);
-	put_n(g); put_c(32);
-	put_n(buf == msg); put_c(32);
-	put_n(k); put_c(32);
-	put_n(at_s(envb, 0)); put_c(32);
-	put_n(at_s(envb, 5)); put_c(10);
+	let envb = rt.new_s(16);
+	let k = rt.bgetenv(name, envb, 16);
+	rt.put_s(buf); rt.put_c(32);
+	rt.put_n(n); rt.put_c(32);
+	rt.put_n(g); rt.put_c(32);
+	rt.put_n(buf == msg); rt.put_c(32);
+	rt.put_n(k); rt.put_c(32);
+	rt.put_n(rt.at_s(envb, 0)); rt.put_c(32);
+	rt.put_n(rt.at_s(envb, 5)); rt.put_c(10);
 	return 0;
 }