[ATLAS-369] feat: add {atlasId} to the supported key in install / import folder scheme

[codeon89]

What this changes

• Add {atlasId} to the support key in install / import folder scheme

Why

#369

How it was tested

• Added tests that cover this change
• For a fix: the regression test fails against the unfixed code
• npm run check passes locally
• New functions and IPC handlers have comments explaining why
• CHANGELOG.md updated
• This PR targets nightly, not main

AI assistance

• No AI was used on this change
• AI was used on this change