Add proper TidalShell version support to fastfetch

[cerealdevv]

Summary

This PR adds native version detection and proper process tree handling for TidalShell (https://github.com).

Changes

• terminalshell.c: Added getShellVersionTidalshell helper. It invokes tidalshell -v (introduced in TidalShell 0.2-Nightly), trims trailing spaces, and isolates the numeric version by stripping out build tags (e.g., -Nightly).
• terminalshell_linux.c: Added tidalshell to the known shells ignore array inside getTerminalInfo. This prevents Fastfetch from misidentifying the shell as a terminal emulator on Linux systems.
• terminalshell_windows.c: Added proper case mapping in setShellInfoDetails so the UI cleanly displays TidalShell.

Checklist

• I have tested my changes locally.

Notes for Reviewers

I'm primarily a C# & PowerShell developer. I do not have a local C/C++ compilation environment set up for fastfetch, therefore these changes have NOT been tested locally yet.

Please review my code. as I stated, I am not primarily a C/C++ developer. I am not as experienced in it.
I do not know if my code is efficient nor if it meets fastfetch quality standards.

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

View in Codacy

_{NEW Get contextual insights on your PRs based on Codacy's metrics, along with PR and Jira context, without leaving GitHub. Enable AI reviewer
TIP This summary will be updated as you push new changes.}

[CarterLi]

these changes have NOT been tested locally yet

No, especially for a random shell I've never heard of.