Copy event type-related files from frontend to backend

These files were thus far made available to musdb via a folder
"commonservices", that was managed separately from the translation tool.
Translating the information was thus made unnecessarily hard and
splintered.
One last file is missing, eventtype_explica.json.

backend/fr/eventtype_name.json

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+{
+    "eventname": {
+        "1": "Created",
+        "2": "Found",
+        "3": "Published",
+        "4": "Creation of reference",
+        "5": "Was imaged",
+        "6": "Was used",
+        "7": "Written",
+        "8": "Collected",
+        "9": "Painted",
+        "10": "Image taken",
+        "11": "Received",
+        "12": "Printing plate produced",
+        "13": "Sent",
+        "14": "Issued",
+        "15": "Signed",
+        "16": "Type description",
+        "19": "Drawn",
+        "20": "Copied (by hand)",
+        "21": "Has lived",
+        "22": "[Relationship to location]",
+        "23": "[Relation to person or institution]",
+        "24": "[Relation to time]",
+        "25": "Commissioned",
+        "26": "Printed",
+        "27": "Recorded",
+        "28": "Sung",
+        "29": "Decor designed",
+        "30": "Form designed",
+        "31": "Modelled",
+        "32": "Autographed",
+        "33": "Mentioned",
+        "34": "Buried",
+        "35": "Intellectual creation",
+        "36": "Was depicted",
+        "37": "Painted on",
+        "38": "Illustrated"
+    }
+}

backend/fr/eventtype_persinst.json

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+{
+    "event_persinst": {
+        "1": "created by",
+        "2": "found by",
+        "3": "published by",
+        "4": "creation of reference by",
+        "5": "was imaged",
+        "6": "was used by",
+        "7": "written by",
+        "8": "collected by",
+        "9": "painted by",
+        "10": "photographed by",
+        "11": "received by",
+        "12": "Printing plate produced by",
+        "13": "sent by",
+        "14": "issued by",
+        "15": "signed by",
+        "16": "Type described by",
+        "19": "drawn by",
+        "20": "copied (by hand) by",
+        "21": "Lived",
+        "22": "[general]",
+        "23": "[general]",
+        "24": "[general]",
+        "25": "commissioned by",
+        "26": "printed by",
+        "27": "recorded by",
+        "28": "sung by",
+        "29": "Decor designed by",
+        "30": "Form designed by",
+        "31": "modelled by",
+        "32": "autographed by",
+        "33": "mentioned by",
+        "34": "buried by",
+        "35": "conceived by",
+        "36": "was imaged",
+        "37": "painted on by",
+        "38": "illustrated by"
+    }
+}

backend/fr/eventtype_place.json

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+{
+    "event_place": {
+        "1": "created in",
+        "2": "found in",
+        "3": "published in",
+        "4": "reference created in",
+        "5": "was imaged in",
+        "6": "was used in",
+        "7": "written in",
+        "8": "collected in",
+        "9": "painted in",
+        "10": "photographed in",
+        "11": "received in",
+        "12": "Printing plate produced in",
+        "13": "sent in",
+        "14": "issued in",
+        "15": "signed in",
+        "16": "Type described in",
+        "19": "drawn in",
+        "20": "was copied (by hand) in",
+        "21": "has lived in",
+        "22": "[general]",
+        "23": "[general]",
+        "24": "[general]",
+        "25": "commissioned in",
+        "26": "printed in",
+        "27": "recorded in",
+        "28": "sung in",
+        "29": "Decor designed in",
+        "30": "Form designed in",
+        "31": "modelled in",
+        "32": "autographed in",
+        "33": "mentioned in",
+        "34": "buried in",
+        "35": "conceived in",
+        "36": "was imaged",
+        "37": "painted on in",
+        "38": "illustrated in"
+    }
+}

backend/fr/eventtype_time.json

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+{
+    "event_time": {
+        "1": "created",
+        "2": "found",
+        "3": "published",
+        "4": "reference created",
+        "5": "was imaged",
+        "6": "was used",
+        "7": "written",
+        "8": "collected",
+        "9": "painted",
+        "10": "photographed",
+        "11": "received",
+        "12": "Printing plate produced",
+        "13": "sent",
+        "14": "issued",
+        "15": "signed",
+        "16": "Type described",
+        "19": "drawn",
+        "20": "copied (by hand)",
+        "21": "has lived",
+        "22": "[general]",
+        "23": "[general]",
+        "24": "[general]",
+        "25": "commissioned",
+        "26": "printed",
+        "27": "recorded",
+        "28": "sung",
+        "29": "Decor designed",
+        "30": "Form designed",
+        "31": "modelled",
+        "32": "autographed",
+        "33": "was mentioned",
+        "34": "buried",
+        "35": "conceived",
+        "36": "was imaged",
+        "37": "painted on",
+        "38": "illustrated"
+    }
+}