Fix glob path composition for Windows-style user profile paths

[Copilot]

glob failed on Windows-style patterns derived from paths like C:\Users\bob because internal path handling mixed slash-specific string concatenation with file APIs. This change makes path composition file-aware and adds focused regression coverage for Windows-style patterns.

• Core glob path handling

  • Replaced slash-based existence checks with file join in glob.globdir.
  • Removed hardcoded / concatenation in glob.glob and switched to file-aware composition for returned tail paths.
  • Preserved literal .* behavior (e.g. dir/. distinct from dir) while keeping separator handling compatible with Windows platform semantics.

• Windows-path regression coverage (tests/glob.test)

  • Added fake-FS path normalization for backslash inputs to match internal fake filesystem representation.
  • Added isolated Windows-style fixture data (drive + user profile tree) used only by new tests.
  • Added success and error regressions for:
    • glob [file join {C:\Users\bob} *]
    • drive-root style matching (C:*)
    • missing profile path error shape.

# Before: slash-specific composition
if {[file exists $dir/$pattern]} { ... }

# After: file-aware composition
if {[file exists [file join $dir $pattern]]} { ... }

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• www.google.com
  • Triggering command: /home/REDACTED/work/jimtcl/jimtcl/jimsh /home/REDACTED/work/jimtcl/jimtcl/jimsh /home/REDACTED/work/jimtcl/jimtcl/tests/runall.tcl -D _GNU_SOURCE _nshelper.c -D_FORTIFY_SOURCE=3 -quiet -dumpbase nshelper.c -dumpbase-ext .c -mtune=generic -plu�� /usr/libexec/gccjim-signal.o -plugin-opt=/usr/tmp/cc8wbcd8.s s -plugin-opt=-pasas -plugin-opt=-pas-I -plugin-opt=-pas. as (dns block)
  • Triggering command: /home/REDACTED/work/jimtcl/jimtcl/jimsh /home/REDACTED/work/jimtcl/jimtcl/jimsh /home/REDACTED/work/jimtcl/jimtcl/tests/runall.tcl /x86_64-linux-gnu/13/collect2 cat gorp�� ndor/bin/cc /x86_64-linux-gnu/13/collect2 e /x86_64-linux-gngit /libexec/gcc/x86commit tnet/tools/echo echo firs�� s-through=-lc s-through=-lgcc /usr/local/sbin/cat . --64 k/_temp/ghcca-no-m cat (dns block)
  • Triggering command: /home/REDACTED/work/jimtcl/jimtcl/jimsh /home/REDACTED/work/jimtcl/jimtcl/jimsh /home/REDACTED/work/jimtcl/jimtcl/tests/runall.tcl bash cat hts k/_temp/ghcca-no-o cc de/node/bin/echoloadtest.o -fPIC -I/home/REDACTED/w-shared ndor/bin/echo echo Seco�� 2 bash k/_temp/ghcca-noloadtest.so --noprofile cat nfig/composer/ve--noprofile cat (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
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