fix: fixed problem with calling python in script

[Allenjin123]

No description provided.

[Copilot]

Pull Request Overview

This PR fixes issues with Python invocations in shell scripts where shell variables were incorrectly quoted, causing the literal variable names to be passed to Python instead of their values. The fix removes the quotes around variable references within the Python code, allowing proper shell variable expansion before the Python interpreter executes.

Key Changes:

• Fixed Python calls in area and frequency calculations by removing quotes around shell variable references (e.g., float('$VAR') → float(${VAR:-0}))
• Added default values to prevent errors when variables are unset
• Modified output formatting in chip area reporting

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

File	Description
synth_core.sh	Fixed Python variable substitution in area and frequency comparison calculations (lines 797-798, 818-819); added blank lines for formatting
scripts/synth_to_gates.sh	Fixed Python variable substitution in chip area calculation (line 211); modified echo statement for total chip area output (line 238)

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