Fix #13333 (better handling when source file is repeated in compile_commands.json)

[danmar]

No description provided.

[danmar]

More tests are needed.. however when I run it manually I see improvement.

[Copilot]

Pull Request Overview

This PR improves the handling of duplicate file entries in compile_commands.json (Fix #13333). Key changes include passing a new fileIndex parameter through various API functions and updating test cases to validate correct ordering and naming of duplicate files.

• Updated file handling in Summaries, Tokenizer, AnalyzerInformation, and cppcheck to include a fileIndex.
• New tests added in testimportproject.cpp, testanalyzerinformation.cpp, and dumpfile_test.py to verify duplicate file scenarios.

Reviewed Changes

Copilot reviewed 15 out of 16 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
test/testsummaries.cpp	Adjusted Summaries::create call to pass a file index.
test/testimportproject.cpp	Added support and tests for handling duplicate file entries.
test/testanalyzerinformation.cpp	Updated analyzer information tests to check the new file index in file names.
test/cli/dumpfile_test.py	Added new test to verify dump file naming for duplicate source files.
lib/tokenize.h/.cpp	Updated simplifyTokens1 to accept a file index parameter.
lib/summaries.h/.cpp	Propagated fileIndex parameter to create analyzer info filenames.
lib/importproject.cpp	Integrated fileIndex mapping while importing compile commands.
lib/filesettings.h	Introduced fileIndex member.
lib/cppcheck.h/.cpp	Updated checkFile and checkClang functions to accept fileIndex.
lib/analyzerinfo.h/.cpp	Modified analyzer info file creation and parsing to include fileIndex.
gui/checkthread.cpp	Updated AnalyzerInformation call with the proper file index.

Files not reviewed (1)

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