Bulk import of services

[jaX10bt]

AS A Service Administrator
I WANT the ability to import multiple services at once
SO THAT I can efficiently import backedup or migrated services

Introduce import mechanism on the Services Overview page:

1. Bulk Import — a new top-right button “Import many / Impordi mitu” that opens a selection modal.

Detailed Requirements

1. Bulk Import Button (Top-Right of Overview Page)

• Positioned next to the Create New Service and Export many buttons.
• Label: Import many / Impordi mitu.
• On click, opens file selector.

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Acceptance Criteria

• A new Import many / Impordi mitu button is added next to the Create and Export buttons.
• File Selector should enable selecting JSON files only.
• File Selector can select more than one json file.
• When Selecting Multiple files and confirming, then file names are and content are sent to back end to save them to services database along with thier structure.
• When services importing is complete, a toast message shows saying Services imported successfully / Teenused imporditi edukalt.
• When services importing fails, a toast message shows saying Services imported failed / Teenuste importimine ebaõnnestus.
• When one or more files are corrupted, it should import the other good files and show a toast saying Could not import the following files (Wrong format or corrupted): file 1, file 2, etc../Järgmisi faile ei õnnestunud importida (vale vorming või rikutud): fail 1, fail 2 jne.
• If a service exists with same name for 1 of the files, then the incoming file name is changed before adding to database by adding _yyyy_MM_dd_HH_mm_ss to it.

[1AhmedYasser]

Pending PR from data mapper