build: generate everything into build/, keep src/ free of generated files

src/ carried 8.4 MB of build output: the genome header, the javascript vm and
its layout, and the language-server image, plus a second copy of the extension
server under editors/vscode/server/. none of it is source.

- move the genome from src/core/genome.h to build/core/genome.h and compile with
  -Ibuild/core; `make all` bootstraps one when it is missing
- write genome.json, layout.ts, layout.js and lsp.json to build/js/
- compile tinyvm.ts to build/js/, typed by a tracked src/js/layout.d.ts so the
  vm needs no generated file beside its source
- build the wasm server into build/editors/vscode/server/ and stage the whole
  server into editors/vscode/server/ only while mkvsix.sh packages it
- redirect the test suite, image_run.js, tinyvm.sh, tinyvm.bat, test_win.ps1 and
  the baremetal build at the new paths, and add make lspimage and make vsix
- stop tracking every generated file

also fix a build blocker: lookup_raw compared skind against K_VAR, which was
never declared, so `make genome` could not run at all. the guard is about
emitted program globals, which are K_GVAR and K_GARR.

tests/test.sh -q reports 159 passed and 21 failed both before and after this
change; every failure is pre-existing and comes from the checked-in genome being
stale relative to src/, plus the bootstrap above.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/js/tinyvm.ts b/src/js/tinyvm.ts
index b6146fb..4b4bc39 100644
--- a/src/js/tinyvm.ts
+++ b/src/js/tinyvm.ts
@@ -10,7 +10,7 @@ declare const process: any, require: any, module: any, __dirname: string, Buffer
 const fs: any = typeof require === 'function' ? require('fs') : undefined;
 const path: any = typeof require === 'function' ? require('path') : undefined;
 
-// the compiler's map, computed from src/core/memmap.h at build time (src/js/layout.ts)
+// the compiler's map, computed from src/core/memmap.h at build time (build/js/layout.js)
 import { MAP } from './layout';
 
 // float bits stay in vm words; arithmetic uses javascript's binary64 numbers.
@@ -915,11 +915,11 @@ export class TinyVM {
     }
 }
 
-// command line runner: node src/js/tinyvm.js <file.zc>, or the source on stdin
+// command line runner: node build/js/tinyvm.js <file.zc>, or the source on stdin
 if (typeof require === 'function' && typeof module !== 'undefined' && require.main === module) {
     const option = process.argv[2];
     if (option === '--help' || option === '-h') {
-        process.stdout.write('usage: node src/js/tinyvm.js [file.zc]\n' +
+        process.stdout.write('usage: node build/js/tinyvm.js [file.zc]\n' +
             'compiles and runs the file, or reads source from stdin when no file is supplied.\n' +
             'input after a backtick is program input.\n' +
             'options:\n  --help, -h  show this help and exit\n' +