chore: add just command launcher

[ovitrif]

Description

This PR:

1. Adds a just command launcher for building, installing, launching, logging, and cleaning the iOS app.
2. Makes the terminal run path closer to Xcode by resolving packages for the scheme, building through the workspace, retrying after a Clean Build Folder equivalent, and retrying install/launch failures that are commonly transient.
3. Adds explicit clean targets for repo-local build artifacts, Bitkit Xcode DerivedData, and SwiftPM caches.

Linked Issues/Tasks

N/A

Screenshot / Video

N/A

QA Notes

Manual Tests

• 1. Terminal -> just run: Debug app builds, installs, and launches on a connected iPhone.
• 2. Terminal -> just run logs: Debug app builds, installs, launches, and streams console logs.
• 3. Terminal -> just run release: Release/mainnet app builds, installs, and launches on a connected iPhone.
• 4. Terminal -> just clean all: repo build artifacts, Bitkit DerivedData, and SwiftPM caches are removed.

Automated Checks

• just run completed a full Debug build, install, and launch on a connected iPhone.
• BITKIT_LAUNCH=0 just run release completed a Release/mainnet build and install on a connected iPhone.
• just clean all was validated against redirected temporary build, DerivedData, and SwiftPM cache paths, including preserving an unrelated DerivedData folder.
• bash -n run.sh
• shellcheck run.sh
• just --dry-run run
• just --dry-run run logs
• just --dry-run run release
• just --dry-run run release logs
• just --dry-run clean
• just --dry-run clean build derived-data spm
• just --dry-run clean all
• git diff --check origin/master...HEAD

[greptile-apps]

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