hls: report the same diagnostics as the CLI for a file

[LinkIsGrim]

Both sides preprocess, parse and analyze a file the same way, then each collected the resulting codes separately.

Preprocessor warnings reached hemtt check and never the editor: pw1_redefine, pw2_invalid_config_case, pw3_padded_arg, pw4_include_case, pw5_undef_not_defined. So did every config note and help, because the editor took only warnings() and errors() from the report while the CLI also pushed notes_and_helps().

hemtt_sqf::check and hemtt_config::check now own that middle. They fold processed.warnings() in with the lint codes, apply the CBA settings skip, and hand back the codes plus whatever the caller still needs. The ends stay where they were: the CLI compiles, rapifies and pushes to the addon, the language server renders LSP diagnostics and maintains its caches.

Diagnostic::to_lsp, emitted one diagnostic per label using the parent code's message and severity. A secondary label therefore became a second diagnostic repeating the parent's message somewhere it did not apply: PW1 marked the previous definition "redefining macro" as though it were the redefinition, and discarded the label's own "previous definition here". It now emits one diagnostic per primary label, falling back to all of them if a code has no primary. That applies to every multi-label diagnostic, not only PW1.

Verified against a project built to trigger each case. PW1, PW5 and help[L-C12] were reported by hemtt check and never published by the editor; they now appear in both, at the same locations.

[codecov]

Codecov Report

❌ Patch coverage is 91.66667% with 16 lines in your changes missing coverage. Please review.
✅ Project coverage is 69.2%. Comparing base (3cc53f9) to head (571a662).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
libs/sqf/src/check.rs	90.4%	7 Missing ⚠️
libs/config/src/check.rs	89.0%	6 Missing ⚠️
bin/src/modules/rapifier.rs	71.4%	2 Missing ⚠️
bin/src/modules/sqf.rs	93.7%	1 Missing ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
libs/config/src/lib.rs	78.7% <ø> (-9.1%)	⬇️
libs/sqf/src/lib.rs	74.7% <ø> (ø)
libs/workspace/src/reporting/diagnostic/mod.rs	86.3% <100.0%> (+19.3%)	⬆️
bin/src/modules/sqf.rs	62.8% <93.7%> (+4.4%)	⬆️
bin/src/modules/rapifier.rs	81.3% <71.4%> (+4.7%)	⬆️
libs/config/src/check.rs	89.0% <89.0%> (ø)
libs/sqf/src/check.rs	90.4% <90.4%> (ø)

... and 2 files with indirect coverage changes

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