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/examples/cli2.zc b/examples/cli2.zc
index 0c3de12..7bff8a1 100644
--- a/examples/cli2.zc
+++ b/examples/cli2.zc
@@ -1,29 +1,32 @@
+namespace;
+include rt, std;
+
 // the command line, the environment, and capturing what a program writes.
 // run it as:  ./bin/zy examples/cli2.zc one two   (the first is this file's path
 // when zy is given one, otherwise <eval>, exactly as argv[0] is in c)
-include "src/lib/std.zc";
+include std;
 
-fn main() {
-	put_s("argv: ");
-	for (int i = 0; i < argc; i++) { put_s(argv[i]); if (i + 1 < argc) put_s(" "); }
-	put_c(10);
+void main() {
+	rt.put_s("argv: ");
+	for (int i = 0; i < std.argc; i++) { rt.put_s(std.argv[i]); if (i + 1 < std.argc) rt.put_s(" "); }
+	rt.put_c(10);
 
 	// envp holds NAME=value strings, so a program can walk all of them
 	let n = 0;
-	for (int i = 0; i < envc; i++) if (Text.starts(envp[i], "HOME=")) n = n + 1;
-	put_s("HOME is set: "); put_n(n > 0); put_c(10);
+	for (int i = 0; i < std.envc; i++) if (std.Text.starts(std.envp[i], "HOME=")) n = n + 1;
+	rt.put_s("HOME is set: "); rt.put_n(n > 0); rt.put_c(10);
 
 	// the same name the old way, one lookup instead of a walk
 	let v[80];
-	put_n(Host.env("HOME", v, 80) > 0); put_c(10);
+	rt.put_n(std.Host.env("HOME", v, 80) > 0); rt.put_c(10);
 
 	// capture what the program writes, instead of printing it. every put_c,
 	// put_s and put_n from here on lands in the buffer.
-	let buf = capture.start();
-	put_s("this goes into the buffer, not the terminal");
-	put_c(10);
-	buf.end();		// stops the capture and terminates the string
-	put_s("captured "); put_n(len_w(buf)); put_s(" characters: ");
-	put_s(buf);
-	return 0;
-}
\ No newline at end of file
+	let buf = std.capture.start();
+	rt.put_s("this goes into the buffer, not the terminal");
+	rt.put_c(10);
+	std.capture.end(buf);		// stops the capture and terminates the string
+	rt.put_s("captured "); rt.put_n(rt.len_w(buf)); rt.put_s(" characters: ");
+	rt.put_s(buf);
+	return;
+}