[WIP] Fix silent failure in install_build_deps script due to missing os-release

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

Original prompt

Please apply the following diffs and create a pull request.
Once the PR is ready, give it a title based on the messages of the fixes being applied.

[{"message":"The inline subshell with `source` may fail silently if /etc/os-release doesn't exist or lacks the ID variables. Consider adding explicit error handling or checking for the file's existence before sourcing it.","fixFiles":[{"filePath":"script/linux/install_build_deps","diff":"diff --git a/script/linux/install_build_deps b/script/linux/install_build_deps\n--- a/script/linux/install_build_deps\n+++ b/script/linux/install_build_deps\n@@ -13,7 +13,15 @@\n # Install some development libraries that will be needed in the compilation\n # process.\n UNAME=\"$(uname -a)\"\n-if [[ \"$(source /etc/os-release; echo $ID $ID_LIKE)\" = *\"debian\"* ]]; then\n+OS_ID=\"\"\n+OS_ID_LIKE=\"\"\n+if [[ -r /etc/os-release ]]; then\n+  # shellcheck disable=SC1091\n+  source /etc/os-release\n+  OS_ID=\"${ID:-}\"\n+  OS_ID_LIKE=\"${ID_LIKE:-}\"\n+fi\n+if [[ \"${OS_ID} ${OS_ID_LIKE}\" = *\"debian\"* ]]; then\n   echo \"⬇️  Installing build-time dependencies...\"\n   # Define the packages to install as a bash array so we can include\n   # comments between lines.\n"}]},{"message":"The unzip command syntax is incorrect. The `-d` flag should be followed immediately by the destination directory, and the files to extract should come after. This should be: `warp_sudo unzip -o /tmp/protoc.zip -d /usr/local 'bin/protoc' 'include/*'` or the more typical form with separate arguments.","fixFiles":[{"filePath":"script/linux/install_build_deps","diff":"diff --git a/script/linux/install_build_deps b/script/linux/install_build_deps\n--- a/script/linux/install_build_deps\n+++ b/script/linux/install_build_deps\n@@ -57,7 +57,7 @@\n   esac\n   curl -fsSL -o /tmp/protoc.zip \\\n     \"https://github.com/protocolbuffers/protobuf/releases/download/v${PROTOC_VERSION}/${PROTOC_ZIP}\"\n-  warp_sudo unzip -o /tmp/protoc.zip -d /usr/local bin/protoc 'include/*'\n+  warp_sudo unzip -o /tmp/protoc.zip -d /usr/local 'bin/protoc' 'include/*'\n   rm /tmp/protoc.zip\n else\n   echo -e \"⚠️  ${red}Unknown Linux distribution; necessary build dependencies may not be installed!${reset}\"\n"}]}]

[BunsDev]

Superseded by #15 which implements all four fixes.