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, 2 deletions

diff --git a/tests/drivers/vscode_hover_test.js b/tests/drivers/vscode_hover_test.js
index 378dda2..8239afd 100644
--- a/tests/drivers/vscode_hover_test.js
+++ b/tests/drivers/vscode_hover_test.js
@@ -27,7 +27,7 @@ exports.run = async () => {
     assert.ok(md.value.includes('**two**') && md.value.includes('`integer`'));
     assert.strictEqual(md.isTrusted, false);
     const storageFile = path.join(root, 'build', 'review', 'hover-storage.zc');
-    fs.writeFileSync(storageFile, 'unchecked fn main() {\n let p = new(int, 3);\n let /* borrowed array */ q = p;\n free(p);\n return q[0];\n}\n');
+    fs.writeFileSync(storageFile, 'include rt; unchecked fn main() {\n let p = rt.new(int, 3);\n let /* borrowed array */ q = p;\n rt.free(p);\n return q[0];\n}\n');
     const storageDoc = await vscode.workspace.openTextDocument(storageFile);
     await vscode.window.showTextDocument(storageDoc);
     let storageHover;
@@ -42,7 +42,24 @@ exports.run = async () => {
     assert.ok(storageMd instanceof vscode.MarkdownString);
     assert.match(storageMd.value, /borrowed array/);
     assert.match(storageMd.value, /lifetime: ended on line 4/);
-    const result = 'ok   real vscode markdown, code fences, block docs, inferred pointer types, and lifetime metadata\n';
+    const valueFile = path.join(root, 'build', 'review', 'hover-values.zc');
+    fs.writeFileSync(valueFile, 'include rt; fn unknown() { return 9; }\nfn main() {\n int count = 42;\n rt.put_n(count);\n count = unknown();\n return count;\n}\n');
+    const valueDoc = await vscode.workspace.openTextDocument(valueFile);
+    await vscode.window.showTextDocument(valueDoc);
+    let valueHover;
+    for (let attempt = 0; attempt < 100; attempt++) {
+        const replies = await vscode.commands.executeCommand('vscode.executeHoverProvider', valueDoc.uri, new vscode.Position(3, 11));
+        valueHover = replies && replies.find(reply => reply.contents.some(md => md.value.includes('value at this position:')));
+        if (valueHover) break;
+        await new Promise(resolve => setTimeout(resolve, 100));
+    }
+    assert.ok(valueHover, 'real editor returns a known value before the unknown assignment');
+    assert.ok(valueHover.contents[0] instanceof vscode.MarkdownString);
+    assert.match(valueHover.contents[0].value, /value at this position:\n```zc\n42\n```/);
+    const unknownHover = await vscode.commands.executeCommand('vscode.executeHoverProvider', valueDoc.uri, new vscode.Position(5, 8));
+    assert.ok(unknownHover.length, 'the later variable still has a type hover');
+    assert.ok(!unknownHover.some(reply => reply.contents.some(md => md.value.includes('value at this position:'))));
+    const result = 'ok   real vscode markdown, code fences, block docs, inferred types, lifetime metadata, and position-aware values\n';
     fs.writeFileSync(path.join(root, 'build', 'review', 'vscode-hover.log'), result);
     console.log(result.trim());
 };