Phase 7a: bitwise operators & | ^ << >> ~ (retire band/bor/shl/…)

First step of the "stop feeling like C" pass. Bitwise ops were functions
(`band(x, MASK)`, `shl(a, 3)`); they are now real operators:

  band -> &   bor -> |   bxor -> ^   shl -> <<   shr -> >>   bnot -> ~

Precedence is Go-style so the C footgun is gone: `<<`/`>>`/`&` bind like `*`,
`|`/`^` like `+`, both tighter than comparison — `flags & MASK == 0` parses as
`(flags & MASK) == 0`. `>>` is logical (lshr), matching the old `shr`.

Mechanics: lexer tokenizes `<< >> & | ^ ~`; p_mul takes `<< >> &`, p_add takes
`| ^`, p_unary takes `~`; emit_bin routes them through the existing int arith
path (arith_code gains and/or/xor/shl/lshr) and E_UN handles `~`. The six
intrinsics are deleted.

Delivered as two reseeds: (A) add the operators keeping the intrinsics, (B)
migrate every call site to operator form (85 lines across compiler + runtime,
via a balanced-paren call->operator script; two multi-line big-endian reads in
image/truetype done by hand) and delete the intrinsics. Vocabulary drops the six
from LUDIC_INTRINSICS (ludic_syntax.h, grammar, LudicTokens.kt) and the grammar
gains a bitwise-operator rule. LANGUAGE.md precedence table rewritten.

Reseeded (21724 lines); C-free fixpoint holds; goldens byte-identical (the PNG
and TrueType decoders lean on these ops); 17/17; vocab + doc-fences clean.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tools/editors/jetbrains/src/main/kotlin/io/ludic/ide/LudicTokens.kt

@@ -71,7 +71,7 @@ object LudicVocabulary {
         "poke32", "peekp", "pokep", "peekf", "pokef", "ptr_add", "ptr_null",
         "ptr_is_null", "as_fixed", "as_int", "file_open", "file_read", "file_write",
         "file_seek", "file_tell", "file_close", "read_byte", "write_byte", "print_str",
-        "str_len", "shl", "shr", "band", "bor", "bxor", "bnot", "os_exit", "os_time",
+        "str_len", "os_exit", "os_time",
         "is_windowed", "game_title", "win_open", "win_poll", "win_present",
         "win_running", "win_close"
     )