Add linux arm64 support

[CaptainDario]

Is your feature request related to a problem? Please describe.
With the current rise in popularity of arm based devices, I would like to be able to run isar on linux arm64. This is currently not possible.

Describe the solution you'd like
Compiling isar for arm64 and bundling it in the release.

Version

• Platform: Linux arm 64
• Flutter version: any
• Isar version: 3.1+

[CaptainDario]

Any comment on this?

[vicenterusso]

Any comment on this?

Do you have logs, errors, or something?

[karniv00l]

Unhandled Exception: IsarError: Unsupported processor architecture "linux_arm64". Please open an issue on GitHub to request it

isar/packages/isar/lib/src/native/isar_core.dart

Lines 214 to 215 in d5cee4a

	'Unsupported processor architecture "${Abi.current()}". '
	'Please open an issue on GitHub to request it.',

there's already an issue on the upstream repo: isar#876