refactor: unify bundle-symlink scripts into setup_bundle_symlinks.py

The three per-version setup_*_bundle_symlinks.py scripts were logically
identical, differing only in the version string.  Replace the duplicated
logic with a single parameterised script:

  tools/linux/setup_bundle_symlinks.py <version>

The three named scripts are kept as one-liner thin wrappers that forward
to the unified script, preserving backwards compatibility.

tools/linux/setup_26_01_bundle_symlinks.py

@@ -1,48 +1,5 @@
 #!/usr/bin/env python3
-"""Creates symlinks in versions/26.01-bundle to mirror vendor directory structure."""
-import os
-from pathlib import Path
-
-ROOT = Path(__file__).resolve().parents[2]
-bundle_root = ROOT / "versions/26.01-bundle"
-vendor_root = ROOT / "versions/26.01"
-bundle_7zip = bundle_root / "CPP/7zip"
-vendor_7zip = vendor_root / "CPP/7zip"
-bundle_cpp  = bundle_root / "CPP"
-vendor_cpp  = vendor_root / "CPP"
-
-# Root-level symlinks: C and Asm
-for name in ("C", "Asm"):
-    target = bundle_root / name
-    if not target.exists() and not target.is_symlink():
-        rel = os.path.relpath(vendor_root / name, bundle_root)
-        os.symlink(rel, target)
-        print(f"  symlink: {target.relative_to(ROOT)} -> {rel}")
-
-for item in vendor_7zip.iterdir():
-    target = bundle_7zip / item.name
-    if not target.exists() and not target.is_symlink():
-        rel = os.path.relpath(item, bundle_7zip)
-        os.symlink(rel, target)
-        print(f"  symlink: {target.relative_to(ROOT)} -> {rel}")
-
-bundle_ui = bundle_7zip / "UI"
-vendor_ui = vendor_7zip / "UI"
-bundle_ui.mkdir(exist_ok=True)
-for item in vendor_ui.iterdir():
-    target = bundle_ui / item.name
-    if not target.exists() and not target.is_symlink():
-        rel = os.path.relpath(item, bundle_ui)
-        os.symlink(rel, target)
-        print(f"  symlink: {target.relative_to(ROOT)} -> {rel}")
-
-for item in vendor_cpp.iterdir():
-    if item.name == "7zip":
-        continue
-    target = bundle_cpp / item.name
-    if not target.exists() and not target.is_symlink():
-        rel = os.path.relpath(item, bundle_cpp)
-        os.symlink(rel, target)
-        print(f"  symlink: {target.relative_to(ROOT)} -> {rel}")
-
-print("Done")
+"""Thin wrapper — delegates to setup_bundle_symlinks.py for version 26.01."""
+import subprocess, sys, pathlib
+script = pathlib.Path(__file__).parent / "setup_bundle_symlinks.py"
+sys.exit(subprocess.call([sys.executable, str(script), "26.01"]))