feat: Gemma 4 support

[giladgd]

Description of change

• feat: Gemma 4 support
• feat: automatically enable flash attention when optimal
• feat: improve inference performance when a grammar is active
• feat: more precise resource usage estimation
• feat: resource usage capping
• feat: useMmap: "auto"
• feat: support Q1_0 quant
• fix: MXFP4_MOE quant name
• fix: Vulkan backend successful load detection even when no devices are available

Resolves #594
Fixes #600

Pull-Request Checklist

• Code is up-to-date with the master branch
• npm run format to apply eslint formatting
• npm run test passes with this change
• This pull request links relevant issues as Fixes #0000
• There are new or updated unit tests validating the change
• Documentation has been updated to reflect this change
• The new commits and pull request title follow conventions explained in pull request guidelines (PRs that do not follow this convention will not be merged)

[0x7s0lt1]

🙏

[EnderBoy9217]

🙏

[giladgd]

Still working on it, hope to finish in the next few days or so.
It’s going to be a bigger change than I initially planned but will significantly improve general stability and performance.