perf: optimize populateTypesAndNames component deduplication W-21991374

[mshanemc]

What issues does this PR fix or reference?

@W-21991374@

Description

• Combined intermediate sourceComponents array into the uniqueSourceComponents deduplication chain, removing one full array allocation and traversal
• Log line now reports unique component count (post-dedup) instead of the raw resolved count
• Added NUT (test/nuts/local/populateTypesAndNames.nut.ts) covering: empty input, Apex class resolution, LWC bundle dedup across multiple input files, force-ignore detection via .forceignore, and unresolvable path handling with/without excludeUnresolvable

Note on NUT setup

TestSession stubs process.cwd() via sinon without calling process.chdir. This causes maybeGetTreeContainer to return undefined, making the resolver use the real cwd (workspace root) for FS operations — which misses project files. NUT uses mkdtempSync + cpSync instead so real cwd ≠ projectPath.

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