Fix monorepo build args split and add test for getBuildOptions

[sjjj986]

Fix monorepo build args split bug and add test for getBuildOptions.

Currently in the buildpack our monorepo build args are joined together as a list using ",", but the adapter is currently parsing this env var by spliting with ".". This is a fix to make sure MONOREPO_BUILD_ARGS should split by commas instead

[gemini-code-assist]

Summary of Changes

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I've addressed an issue in the buildpack where MONOREPO_BUILD_ARGS were being incorrectly parsed. Previously, the system expected these arguments to be separated by periods, but they are actually joined by commas. This change ensures that the build arguments for monorepos are now correctly interpreted, allowing builds to proceed as intended.

Highlights

• Monorepo Build Arguments Parsing: Changed the delimiter used to split the MONOREPO_BUILD_ARGS environment variable from a period (.) to a comma (,) within the getBuildOptions function. This corrects an issue where build arguments were not being parsed as expected.

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[gemini-code-assist]

Code Review

This pull request fixes an issue where MONOREPO_BUILD_ARGS was being split by a dot instead of a comma. The change correctly updates the delimiter. I've added a suggestion to make the argument parsing more robust by handling empty strings and extra whitespace, which will prevent potential issues with the build command.