Strip escaped bus feature

[nataliakokoromyti]

Adds support for stripping escaped characters from bus indices in SDC files.

Features:

• Properly handles escaped brackets in bus specifications
• Cleans up bus parsing
• Improves compatibility with different bus naming conventions

[jjcherry56]

Most of the changes have little to do with the title of the PR.
Remove those changes and provide a test case or example of what problem this is solving.

[QuantamHD]

Looks like there's some merge artifacts that need to be removed as well.

[jjcherry56]

It is still unclear what problem this is trying to solve, but I am pretty certain SdcNetwork is where the escaping issues belong, not in PatternMatch, and not with a varaiable to control them.