PSScriptanalyzer rules port

[chanel-y]

Porting the following:

AvoidUsingComputerNameHardcoded
AvoidUsingConvertToSecureStringWithPlainText
AvoidUsingUsernameAndPasswordParams
ReservedCmdletChar

[Copilot]

Pull Request Overview

This PR ports several PSScriptanalyzer rules and updates related example code, documentation, and workflow automation for the CodeQL repository.

• Adds a new example in C for conditional leap year logic.
• Updates change notes with a new class for additional call targets.
• Introduces and enhances GitHub workflows along with security and README updates.

Reviewed Changes

Copilot reviewed 1850 out of 1862 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
cpp/ql/src/Likely Bugs/Leap Year/examples/LeapYearConditionalLogicBad.c	Adds example code demonstrating leap year logic with branch comments.
cpp/ql/lib/change-notes/2023-10-12-additional-call-targets.md	Documenting the addition of the AdditionalCallTarget class.
SECURITY.md	Includes updated security guidelines and instructions.
README.md	Minor updates to spacing in tasks section.
.github/workflows/sync-main.yml	New workflow for syncing the main branch with upstream changes.
.github/workflows/powershell-pr-check.yml	New PowerShell PR check workflow for the repository.

Files not reviewed (12)

• cpp/ql/lib/experimental/cryptography/utils/OpenSSL/CryptoFunction.qll: Language not supported
• cpp/ql/lib/semmle/code/cpp/models/implementations/Iterator.qll: Language not supported
• cpp/ql/src/Likely Bugs/Leap Year/Adding365DaysPerYear.ql: Language not supported
• cpp/ql/src/Likely Bugs/Leap Year/AntiPattern5InvalidLeapYearCheck.ql: Language not supported
• cpp/ql/src/Likely Bugs/Leap Year/LeapYearConditionalLogic.qhelp: Language not supported
• cpp/ql/src/Likely Bugs/Leap Year/LeapYearConditionalLogic.ql: Language not supported
• cpp/ql/src/Likely Bugs/Leap Year/UncheckedLeapYearAfterYearModification.qhelp: Language not supported
• cpp/ql/src/Likely Bugs/Leap Year/UncheckedLeapYearAfterYearModification.ql: Language not supported
• cpp/ql/src/Likely Bugs/Leap Year/UncheckedReturnValueForTimeFunctions.qhelp: Language not supported
• cpp/ql/src/Likely Bugs/Leap Year/UncheckedReturnValueForTimeFunctions.ql: Language not supported
• cpp/ql/src/Likely Bugs/Leap Year/UnsafeArrayForDaysOfYear.qhelp: Language not supported
• cpp/ql/src/Likely Bugs/Leap Year/UnsafeArrayForDaysOfYear.ql: Language not supported

Comments suppressed due to low confidence (2)

cpp/ql/src/Likely Bugs/Leap Year/examples/LeapYearConditionalLogicBad.c:5

• Consider adding tests that cover the 'isLeapYear' true branch to ensure the untested path is validated.

    // untested path

cpp/ql/src/Likely Bugs/Leap Year/examples/LeapYearConditionalLogicBad.c:16

• Add tests to cover the leap day detection branch to ensure complete testing of the conditional logic.

    // untested path