docs (en, pl) and editors: masks, tails, shuffles, lookup, dot_add, @cpu, cpu_has, Nix

- technicians' guides: section 31 rewritten around kernels (masks, the end of a list, moving lanes,
  int8 dot products, choosing instructions at build and at run time)
- cheat sheets and engineers' guides: the new operations and their IR; how features are found
- Kate and VS Code: @cpu, boolxN and the new built-ins highlighted

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Psc42moPLwP43Cmb9oZqSR

editors/kate/finch.xml

@@ -82,6 +82,19 @@
       <item>atomic_store</item>
       <item>atomic_swap</item>
       <item>atomic_cas</item>
+      <item>select</item>
+      <item>concat</item>
+      <item>fma</item>
+      <item>muladd</item>
+      <item>cpu_has</item>
+      <item>f32_bits</item>
+      <item>f32_from_bits</item>
+      <item>f64_bits</item>
+      <item>f64_from_bits</item>
+      <item>f16_to_f32</item>
+      <item>f32_to_f16</item>
+      <item>bf16_to_f32</item>
+      <item>f32_to_bf16</item>
     </list>
 
     <contexts>
@@ -104,7 +117,8 @@
         <keyword String="constants" attribute="Constant"/>
         <keyword String="types" attribute="Data Type"/>
         <!-- vectors: f32x8, i8x32, u16x16, f64x4 ... -->
-        <RegExpr String="\b[iuf](8|16|32|64)x(2|4|8|16|32|64)\b" attribute="Data Type"/>
+        <RegExpr String="\b([iuf](8|16|32|64)|bool)x(2|4|8|16|32|64)\b" attribute="Data Type"/>
+        <RegExpr String="@cpu\b" attribute="Keyword"/>
         <keyword String="builtins" attribute="Built-in"/>
 
         <RegExpr String="\b0[xX][0-9a-fA-F_]+\b" attribute="Hex"/>