v0.2: Pico-8 Lua dialect grammar and language

Reorganize into grammars/<name>/ subdirs ( Zed's [grammars.*] supports
a `path` field, so both grammars ship from this repo without a sibling-
repo split ). Vendor tree-sitter-lua as the fork base for tree-sitter-
pico8-lua; upstream MIT license preserved at grammars/pico-8-lua/
UPSTREAM-LICENSE.md.

Dialect features added: != as ~= alias, \ integer divide, ^^ binary xor,
>>> / <<> / >>< shifts and rotates, compound-assignment statements,
memory peek prefixes @ % $ (% coexists with binary modulo), single-line
`if (cond) stmt [else stmt]` and `while (cond) stmt`, statement-level
print shorthand ?, and `#include path` directives. Identifier rule no
longer accepts ! ? @ $ ( upstream did ).

Pico-8 Lua language ( languages/pico-8-lua/, suffix .p8lua ) ships
highlights with the full ~110 PICO-8 builtins as @function.builtin.
The cart injection now hands __lua__ bodies to pico-8-lua, so .p8 carts
and bare .p8lua files share the dialect-aware grammar. Examples updated
to exercise the dialect end-to-end.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

extension.toml

@@ -1,15 +1,25 @@
 id = "pico-8"
 name = "Pico-8"
-version = "0.0.1"
+version = "0.0.2"
 schema_version = 1
 authors = ["Kistaro Windrider <kistaro@gmail.com>"]
 description = "Pico-8 cartridge (.p8) and Lua dialect support for Zed"
 repository = "https://github.com/kistaro/zed-p8"
 
-# The .p8 cart container grammar lives at the root of this repo.
-# During local development, set `repository` to `file://` + the absolute
-# path of your clone and pin `rev` to a committed SHA. When publishing,
-# this should point at a public Git URL.
+# Both grammars live in this same repository, in subdirectories under
+# `grammars/`. Zed's [grammars.*] block supports a `path` field for
+# exactly this layout. During local development, `repository` is a
+# `file://` URL pointing at this clone and `rev` is pinned to a
+# committed SHA — Zed clones the grammar at that revision rather than
+# reading the working tree, so changes only take effect after a commit
+# + a `rev` bump in this file.
+
 [grammars.p8_cart]
 repository = "file:///Users/norberg/gitea-repos/zed-p8"
-rev = "3f209efa897558e8ecd7aa3612846dc12798b0bb"
+rev = "REPLACE_AT_NEXT_COMMIT"
+path = "grammars/p8-cart"
+
+[grammars.pico8_lua]
+repository = "file:///Users/norberg/gitea-repos/zed-p8"
+rev = "REPLACE_AT_NEXT_COMMIT"
+path = "grammars/pico-8-lua"