feat: replace alpine with ubuntu

[RohitKushvaha01]

Closes #2200
Closes #2688

[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge.

Summary

• Migrates terminal assets, initialization, process management, and document-provider behavior to Ubuntu.
• Updates LSP runtime providers and package installation commands from Alpine/apk to Ubuntu/apt.
• Rejects legacy Alpine terminal backups and validates restored Ubuntu installations before reporting success.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart LR
  A[User selects terminal backup] --> B[Detect archive layout]
  B -->|Alpine or unknown| C[Reject before deleting installation]
  B -->|Ubuntu| D[Stop active AXS process]
  D --> E[Remove current Ubuntu installation files]
  E --> F[Extract backup into app files directory]
  F --> G{Ubuntu installation markers valid?}
  G -->|No| H[Report incomplete restore]
  G -->|Yes| I[Report restore success]

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_{Reviews (3) · Last reviewed commit: "removed useless comment"}

[ardyt647]

Bro ubuntu is very heavy for lowend devices. instead of ubuntu we should use debain which same as ubuntu but lightweight

[RohitKushvaha01]

Bro ubuntu is very heavy for lowend devices. instead of ubuntu we should use debain which same as ubuntu but lightweight

Debian rootfs is around 70mb+ meanwhile the ubuntu rootfs is around 35mb+

[ardyt647]

Bro I am taking about performance not how much storage it needs

[indra87g]

Will this change can solve the stuck issue when compiling Rust code (cargo run)?

[RohitKushvaha01]

Bro I am taking about performance not how much storage it needs

Both debian and ubuntu performs exactly the same

[RohitKushvaha01]

Will this change can solve the stuck issue when compiling Rust code (cargo run)?

probably

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