finch.toml, threads and atomics, finch fmt, C++ files, struct #defines, a struct variable given for its ptr

- finch.toml: name, entry, paths, include, links, libdirs, cflags, ldflags, and [target.windows] etc.;
  finch run / build / test with no file use its entry
- import thread: spawn, join, mutex, cpus; atomic_add/sub/load/store/swap/cas built in
- finch fmt [--check]: indentation by { }, trailing spaces, empty lines; also as LSP formatting
- link "x.cpp" (or in finch.toml): built with the C++ compiler, which then links (FINCH_CXX)
- #define RAYWHITE (Color){ 245, 245, 245, 255 } imports as a Color
- push(body) where push takes ptr[Body]: the same as push(addr(body))
- --target android (NDK clang from ANDROID_NDK_HOME, -llog)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016GzNP6r8dg6WDxUVZy8wjL

tests/lsp_test.py

@@ -124,6 +124,12 @@ syms = c.request("textDocument/documentSymbol", {"textDocument": td})
 names = sorted(s["name"] for s in syms)
 check("document symbols", names == ["Point", "add", "main"], names)
 
+messy = "fn main() {\n  x := 1   \n\n\n\tprint(x)\n}"
+c.notify("textDocument/didChange", {"textDocument": {"uri": uri, "version": 5}, "contentChanges": [{"text": messy}]})
+fm = c.request("textDocument/formatting", {"textDocument": td, "options": {"tabSize": 4, "insertSpaces": True}})
+check("formatting", fm and fm[0]["newText"] == "fn main() {\n    x := 1\n\n    print(x)\n}\n", fm)
+c.notify("textDocument/didChange", {"textDocument": {"uri": uri, "version": 5}, "contentChanges": [{"text": src}]})
+
 bad = src.replace("total := add(p.x, p.y)", 'total := add(p.x, "y")')
 c.notify("textDocument/didChange", {"textDocument": {"uri": uri, "version": 6}, "contentChanges": [{"text": bad}]})
 diags = c.diagnostics(uri)