cons: fix Windows console VT mode save and restore

[IndAlok]

Title:
cons: fix Windows console VT mode save and restore

Your checklist for this pull request

• I've read the guidelines for contributing to this repository.
• I made sure to follow the project's coding style.
• I've documented every RZ_API function and struct this PR changes.
• I've added tests that prove my changes are effective (required for changes to RZ_API).
• I've updated the Rizin book with the relevant information (if needed).
• I've used AI tools to generate fully or partially these code changes and I'm sure the changes are not copyrighted by somebody else.

Detailed description

this pr fixes win console mode handling during rizin startup and teardown. (related to #6166)

while testing the table query changes in win in meson devenv, rizin would complete the requested cmd but still leave the terminal in a bad state and print:

SetConsoleMode: (0x57) The parameter is incorrect.

the root problem was in the shared win console lifecycle, not in any specific cmd.

this pr keeps the fix limited to the console code paths that actually own and mutate win console state:

• librz/cons/cons.c
• librz/cons/input.c
• librz/core/cconfig.c

the changes are:

1. save the original console state before VT probing mutates it.
   previously, the saved console mode could already reflect side effects from early VT detection. that makes later restore unreliable because the stored state is no longer the real original host state.

2. restore only the console mode bits Rizin actually owns.
   previously, the restore path replayed the full saved mode word. in win, this is fragile, esp. when running under nested shells or meson devenv, because it may overwrite flags owned by the hosting console instead of only undoing rizin’s own changes.

3. fix VT input enabling in scr_vtmode().
   the old code used mode & ENABLE_VIRTUAL_TERMINAL_INPUT, which effectively stripped other input flags instead of enabling VT input. this pr changes that to the flag preserving behavior.

4. avoid temporary input mode writes on non console stdin.
   some temporary console mode transitions assumed stdin was always a valid console handle. this pr guards those paths so batch or redirected runs do not try to call SetConsoleMode() on non-console input.

the idea behind the patch is to fix the shared console state contract directly.

Test plan

verified on win after building

Closing issues

N/A

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 48.24%. Comparing base (66ccde5) to head (10119aa).
⚠️ Report is 1 commits behind head on dev.

Additional details and impacted files

Files with missing lines	Coverage Δ
librz/cons/cons.c	54.58% <ø> (ø)
librz/cons/input.c	14.76% <ø> (ø)
librz/core/cconfig.c	81.45% <ø> (ø)

... and 7 files with indirect coverage changes

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[wargio]

this is ok, but when we refactor the tui code, we need a way to handle all these globals.