Remove LLVM from infs

[0xGeorgii]

Closes #126

[codecov]

Codecov Report

❌ Patch coverage is 90.71038% with 17 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
apps/infs/src/toolchain/conflict.rs	61.90%	8 Missing ⚠️
apps/infs/src/toolchain/doctor.rs	88.67%	6 Missing ⚠️
apps/infs/src/commands/self_cmd.rs	0.00%	2 Missing ⚠️
apps/infs/src/toolchain/resolver.rs	0.00%	1 Missing ⚠️

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[Copilot]

Pull request overview

Updates the infs CLI and related docs/tests to reflect the removal of LLVM tooling, narrowing toolchain management and health checks to the infc compiler binary.

Changes:

• Remove LLVM-related toolchain binaries/checks (inf-llc, rust-lld, libLLVM) and update doctor/TUI/test expectations accordingly.
• Simplify toolchain path/symlink management to a single managed binary (infc) and update archive/scaffold/test utilities for the new layout.
• Replace rand usage with fastrand and delete now-unused fixtures/helpers/APIs.

Reviewed changes

Copilot reviewed 21 out of 21 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
editors/vscode/QA_GUIDE.md	Updates QA guidance/examples to match new toolchain warning scenarios.
apps/infs/tests/fixtures/type_error.inf	Removes unused fixture.
apps/infs/tests/cli_integration.rs	Updates doctor output assertions; removes redundant tests/helpers tied to removed fixtures/commands.
apps/infs/src/tui/widgets/mod.rs	Updates widget module docs to match current widget set.
apps/infs/src/tui/views/doctor_view.rs	Updates TUI doctor view tests to reflect infc-only checks.
apps/infs/src/tui/theme.rs	Removes unused theme field.
apps/infs/src/toolchain/resolver.rs	Switches to root-level infc resolution via binary_path.
apps/infs/src/toolchain/paths.rs	Reduces managed binaries to infc, simplifies binary_path, and updates symlink/validation logic + tests.
apps/infs/src/toolchain/manifest.rs	Removes unused manifest helper and test.
apps/infs/src/toolchain/download.rs	Replaces rand jitter with fastrand.
apps/infs/src/toolchain/doctor.rs	Removes LLVM checks and replaces generic binary checks with check_infc.
apps/infs/src/toolchain/conflict.rs	Limits PATH conflict detection docs/logic to managed infc and updates tests.
apps/infs/src/toolchain/archive.rs	Updates permission handling/tests to match infc root layout and removes LLVM artifacts from fixtures.
apps/infs/src/project/scaffold.rs	Removes unused convenience API and switches temp dir randomness to fastrand.
apps/infs/src/project/mod.rs	Removes unused re-exports tied to deleted APIs.
apps/infs/src/errors.rs	Removes unused typed error variants, retaining only process-exit propagation.
apps/infs/src/commands/doctor.rs	Updates command docs to reflect infc-only checks.
apps/infs/docs/qa-test-suite.md	Updates test counts and fixture list; refreshes last-updated date.
apps/infs/README.md	Updates docs to reflect only infc being symlinked.
apps/infs/Cargo.toml	Swaps rand dependency for fastrand.
CHANGELOG.md	Updates changelog wording to match infc-only symlinking.

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