Codechange: add tests for GS <-> AdminPort JSON conversion (#11252)

While at it, fix a bug where booleans were made integers.

Add: [Script] GSAsyncMode to set async mode of gamescript commands (#10913)

In asynchronous mode, don't wait for result of executed command,
just fire-and-forget, and return estimated cost/result

Change: Replace ScriptLog data array with std::deque. (#10770)

Due to cyclic header dependency this requires moving the data types used
by ScriptLog out of the ScriptLog class.

Change: Limit memory allocations for each Squirrel instance

This can avoid out-of-memory situations due to single scripts using up the entire address space.
Instead, scripts that go above the maximum are killed.
The maximum is default 1 GB per script, but can be configured by a setting.