patches: fix 3 blockers — duplicate functions, idx typo, doc cap

BLOCKER fixes:
1. Remove duplicate ns_ax_face_is_selected, ns_ax_selected_overlay_text,
   ns_ax_selected_child_frame_text definitions from patch 0002
   (now defined only in 0007/0008 where they belong)
2. Fix idx → point_idx in accessibilityInsertionPointLineNumber (0002)
3. Remove stale 100K cap reference from documentation (0006)

Architecture fix:
- ns_ax_selected_child_frame_text moved from 0007 to 0008
  (where it logically belongs)

Verified: all 8 patches apply cleanly on fresh emacs HEAD.

patches/0001-ns-add-accessibility-base-classes-and-text-extractio.patch

@@ -1,4 +1,4 @@
-From d176c3c9d97574f0cd493d6491eda0a82ad28387 Mon Sep 17 00:00:00 2001
+From 2730f8ddf26bfe5f5fb7553793fc537f45d46476 Mon Sep 17 00:00:00 2001
 From: Martin Sukany <martin@sukany.cz>
 Date: Sat, 28 Feb 2026 12:58:11 +0100
 Subject: [PATCH 1/8] ns: add accessibility base classes and text extraction
@@ -193,7 +193,7 @@ diff --git a/src/nsterm.m b/src/nsterm.m
 index 74e4ad5..2ac1d9d 100644
 --- a/src/nsterm.m
 +++ b/src/nsterm.m
-@@ -46,6 +46,7 @@ GNUstep port and post-20 update by Adrian Robert (arobert@cogsci.ucsd.edu)
+@@ -46,6 +46,7 @@ Updated by Christian Limpach (chris@nice.ch)
  #include "blockinput.h"
  #include "sysselect.h"
  #include "nsterm.h"
@@ -201,7 +201,7 @@ index 74e4ad5..2ac1d9d 100644
  #include "systime.h"
  #include "character.h"
  #include "xwidget.h"
-@@ -6856,6 +6857,430 @@ ns_create_font_panel_buttons (id target, SEL select, SEL cancel_action)
+@@ -6856,6 +6857,430 @@ - (BOOL)fulfillService: (NSString *)name withArg: (NSString *)arg
  }
  #endif
  
@@ -632,7 +632,7 @@ index 74e4ad5..2ac1d9d 100644
  /* ==========================================================================
  
      EmacsView implementation
-@@ -11312,6 +11737,28 @@ syms_of_nsterm (void)
+@@ -11312,6 +11737,28 @@ Convert an X font name (XLFD) to an NS font name.
    DEFSYM (Qns_drag_operation_generic, "ns-drag-operation-generic");
    DEFSYM (Qns_handle_drag_motion, "ns-handle-drag-motion");
  
@@ -661,7 +661,7 @@ index 74e4ad5..2ac1d9d 100644
    Fput (Qalt, Qmodifier_value, make_fixnum (alt_modifier));
    Fput (Qhyper, Qmodifier_value, make_fixnum (hyper_modifier));
    Fput (Qmeta, Qmodifier_value, make_fixnum (meta_modifier));
-@@ -11460,6 +11907,15 @@ Note that this does not apply to images.
+@@ -11460,6 +11907,15 @@ Nil means use fullscreen the old (< 10.7) way.  The old way works better with
  This variable is ignored on Mac OS X < 10.7 and GNUstep.  */);
    ns_use_srgb_colorspace = YES;