docs: update vfolder images and descriptions

[ironAiken2]

This PR is about updating vfolder section for 24.09

Changes:

• Added a feature description for the new folder creation modal and updated related images.

Related PR:

• refactor: folder creation modal backend.ai-webui#2745 @ironAiken2
• feat: Folder Explorer as an independent component backend.ai-webui#2529 @ironAiken2

PDF[ko] : 데이터 & 폴더 활용하기 — Backend.AI Web-UI User Guide 24.03 문서.pdf

PDF[en] : Handling Data & Storage Folders — Backend.AI Web-UI User Guide 24.03 documentation.pdf

[ironAiken2]

• docs: update images and add 'classic session launcher' description #92
• docs: update images and add description of default session launcher #91
• docs: update images and add links to related page #87
• docs: update images and add 'resource policy setting in user modify modal` description #93
• docs: update images for neo session launcher #94
• docs: update vfolder images and descriptions #89 👈 (View in Graphite)
• docs: add session history feature, folder explorer and folder create modal descriptions #86
• docs: use folder explorer and create a new folder in session launcher #90
• main

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[YEONFEEL96]

Minor updates to the wording to align with the revisions in the current documentation.
Certain aspects that cannot be modified via GithHub Suggestion at this point, which I will address in a subsequent PR.

[YEONFEEL96]

LGTM

[ironAiken2]

Can you change the status to approve? :)

[YEONFEEL96]

Changed my stat to approved.

[ironAiken2]

Merge activity

• Nov 22, 12:36 AM EST: A user started a stack merge that includes this pull request via Graphite.
• Nov 22, 12:42 AM EST: Graphite rebased this pull request as part of a merge.
• Nov 22, 12:43 AM EST: A user merged this pull request with Graphite.