Fix VM initialization bug and update module dependencies

Ensure `instructions` is properly assigned during VM initialization to prevent runtime issues. Update `go.mod` and `go.sum` to include the latest version of `github.com/itrn0/risor/modules/gha` and adjust indirect dependencies for consistency.

Rename module references from risor-io to itrn0

Update import paths to use "github.com/itrn0" namespace

Add memory management and execution limits to VM

Implemented memory usage tracking and enforced limits for both memory consumption and executable instructions in the Virtual Machine. Refactored stack operations to include size calculations and updated control flow to handle resource limits gracefully.

Add memory management and execution limits to VM

Implemented memory usage tracking and enforced limits for both memory consumption and executable instructions in the Virtual Machine. Refactored stack operations to include size calculations and updated control flow to handle resource limits gracefully.

Add memory management and execution limits to VM

Implemented memory usage tracking and enforced limits for both memory consumption and executable instructions in the Virtual Machine. Refactored stack operations to include size calculations and updated control flow to handle resource limits gracefully.

Rename module references from risor-io to itrn0

Update import paths to use "github.com/itrn0" namespace

Add memory management and execution limits to VM

Implemented memory usage tracking and enforced limits for both memory consumption and executable instructions in the Virtual Machine. Refactored stack operations to include size calculations and updated control flow to handle resource limits gracefully.

Add memory management and execution limits to VM

Implemented memory usage tracking and enforced limits for both memory consumption and executable instructions in the Virtual Machine. Refactored stack operations to include size calculations and updated control flow to handle resource limits gracefully.