Insertion live template for connections

[ducky64]

Adds insertion live template support for GUI connect operations. Experimental, partially implemented (for single ports only, limited support for arrays and boundary ports), currently behind a toggle in the settings menu.

Architecturally, this separates the connect-builder (which determines which connections are allowed to a link) from the block analysis (which determines which ports are in a connected group, and what connects are available to a port), from the IR mutator (the executor, which takes a connectivity change and updates the Block IR), from the code generator / insertion live template. Probably more code to before, but in chunks that actually make more sense. Prior, GUI connects were much more monolithic code-wise.

Other functional changes:

• Fix getting the nearest insertion location when above the class level - prior it crashed because it would traverse to the folder level and can’t getTextRange. Now it detects a null text range is invalid.

Other refactoring / infrastructural changes:

• Updates to support the new connect expansion.
  • Refactor the IR-to-graph parsing to use the expanded versions, if available.
• Move the insert block live template to its own file
• Support no variables in insertion live template

Future TODOs

• Support suggested index - perhaps as template field
• Don’t allow name when connecting to an existing named link
• Support connect append in live template
• Support boundary ports including bridging
• Better support for array types