[Refactor] (CMakeLists.txt, MG_Backend, MG_Backend/DirectVulkan, MG_Impl/GLImpl, MG_Impl/Pipe, MG_IntegrationTest/Scenarios, MG_Pipe/generated, MG_Remote/Client, MG_Test/Query, MG_Test/Texture, scripts, scripts/data): move the function table and shared-image types out of BackendObject.h

- BackendFunctions.h holds GLFunctionsTable, GlobalBackendFunctionsTable, CopyImageEndpoint, the sync and query handles and the present damage; files that only call through the table include it instead of the backend object
- SharedImageTypes.h holds the shared-image structs
- FormatCapabilities.cpp holds the BackendCaps.h helpers that BackendObject.cpp defined
- gen_pipe.py reads the table from its new header
- two comments that cited a BackendObject.cpp line name the function instead

scripts/data/text_hygiene_baseline.json

@@ -1,6 +1,6 @@
 {
   "allcaps_comment_lines": 2253,
-  "line_citations": 159,
+  "line_citations": 156,
   "long_comment_excess_lines": 8895,
   "non_english_comment_lines": 20,
   "planning_code_comment_lines": 3188

scripts/gen_pipe.py

@@ -45,7 +45,7 @@ REPO_ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 PIPE_DIR = os.path.join(REPO_ROOT, "MobileGL", "MG_Pipe")
 GENERATED_DIR = os.path.join(PIPE_DIR, "generated")
 INVENTORY = os.path.join(REPO_ROOT, "scripts", "data", "backend_read_inventory.md")
-FUNCTION_TABLE_HEADER = os.path.join(REPO_ROOT, "MobileGL", "MG_Backend", "BackendObject.h")
+FUNCTION_TABLE_HEADER = os.path.join(REPO_ROOT, "MobileGL", "MG_Backend", "BackendFunctions.h")
 
 GENERATED_BANNER = """// MobileGL - MobileGL/MG_Pipe/generated/{name}
 // Copyright (c) 2025-2026 MobileGL-Dev
@@ -227,7 +227,7 @@ MEMCMP_FALLBACK_TYPES = set()
 
 # Where the structs named in PipeFields.def are declared: the payload header, the value
 # header, the host-span header, the backend capability header (DynamicBackendParameters, the
-# caps block) and the backend object header.
+# caps block) and the backend function table header.
 FIELD_LIST_STRUCT_HEADERS = [
     os.path.join(PIPE_DIR, "MGPipeTypes.h"),
     os.path.join(PIPE_DIR, "MGPipeValueTypes.h"),
@@ -1344,7 +1344,7 @@ def gen_fill_points(accessors, sticky, verbs, classes, fields):
     words = max(2, (len(accessors) + 63) // 64)
     sticky_names = [name for name, _ in sticky]
     out = [banner("PipeFillPoints.inc", "G5b: the verb enum, the verb classes and their may-read field masks.",
-                  "FillPoints.def, Coverage.def and MG_Backend/BackendObject.h")]
+                  "FillPoints.def, Coverage.def and MG_Backend/BackendFunctions.h")]
     out.append("""// One verb per function-pointer member of MG_Backend::GLFunctionsTable, in declaration
 // order, so the enum IS the table's member list. MG_Impl spells MGP_FILL(Verb) before every
 // call through the table; MGPipeFillForVerb fills exactly the fields of the verb's class