Bump MSRV to match clap dependency

[rukai]

Since clap 4.4 bumped its MSRV to 1.70 inferno no longer builds on 1.64 and needs minimum 1.70 This PR:

• bumps inferno's MSRV to 1.70
• makes use of a new stdlib API in 1.70 to drop the is-terminal and rustix dependencies.
  • This was also cargo's motivation for bumping MSRV which is how I noticed we could do the same here.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 91.01%. Comparing base (5d88bc3) to head (8af0614). Report is 44 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #301 +/- ## ======================================= Coverage 91.01% 91.01% ======================================= Files 19 19 Lines 4385 4385 ======================================= Hits 3991 3991 Misses 394 394 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

---

🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests
• JS Bundle Analysis - Avoid shipping oversized bundles

[rukai]

Understandable, I'll mark this as draft so it's around when it's needed.

[jonhoo]

Given I'm about to do a breaking release anyway in https://github.com/jonhoo/inferno/pull/335, I'll land this as part of it! May have to do some cherry-picking, but hey, it did end up useful in the end :D

[jonhoo]

Merged in https://github.com/jonhoo/inferno/pull/336