Add ZIP bulk upload to asset manager

Features:
- Upload ZIP files with folder structure
- Automatic extraction and MD5/SHA256 calculation
- Preserve folder paths as EA CDN paths
- Auto-categorize based on file extensions
- Update existing assets automatically
- Bootstrap tabs for single/bulk upload UI
- Progress feedback (X new, Y updated)

Example: cars/porsche.dat → /cars/porsche.dat

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

RR3CommunityServer/obj/Debug/net8.0/RR3CommunityServer.AssemblyInfo.cs

@@ -13,7 +13,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("RR3CommunityServer")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+f1d0d43cb70abf0fc44598a01a6250f3b7b73922")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+15e842ce855b748cc97c43261eba408067128330")]
 [assembly: System.Reflection.AssemblyProductAttribute("RR3CommunityServer")]
 [assembly: System.Reflection.AssemblyTitleAttribute("RR3CommunityServer")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]

RR3CommunityServer/obj/Debug/net8.0/RR3CommunityServer.AssemblyInfoInputs.cache

@@ -1 +1 @@
-42ee391f7017f761577d9436f4160570943e6c116049654eb80a0c5412651e8a
+57cc4aab962a2ad12c842505535b2be3f034220ea319669b999c8dc52168130d

RR3CommunityServer/obj/Debug/net8.0/RR3CommunityServer.sourcelink.json

@@ -1 +1 @@
-{"documents":{"E:\\rr3\\RR3CommunityServer\\*":"https://raw.githubusercontent.com/ssfdre38/rr3-server/f1d0d43cb70abf0fc44598a01a6250f3b7b73922/*"}}
+{"documents":{"E:\\rr3\\RR3CommunityServer\\*":"https://raw.githubusercontent.com/ssfdre38/rr3-server/15e842ce855b748cc97c43261eba408067128330/*"}}

RR3CommunityServer/obj/Debug/net8.0/rpswa.dswa.cache.json

@@ -1 +1 @@
-{"GlobalPropertiesHash":"gdYA/PLOQysRMD9wt3+IrqBqQw0g/GZFOcojepf8P6w=","FingerprintPatternsHash":"gq3WsqcKBUGTSNle7RKKyXRIwh7M8ccEqOqYvIzoM04=","PropertyOverridesHash":"8ZRc1sGeVrPBx4lD717BgRaQekyh78QKV9SKsdt638U=","InputHashes":["7Gcs8uTS1W2TjgmuuoBwaL/zy\u002B2wcKht3msEI7xtxEM=","UWedSjPPgrw4tts2Bk2ce0nYJfnBV9zMYOAjYg0PED8=","GecKXPxV0EAagvAtrRNTytwMtFCxZmgKm9sjLyEe8oI=","AD8WKv0o3OeySN/Mlu5s1a4y3Dt/ik0jFKKHCrGjFtA=","hnhSRoeFpk3C6XWICUlX/lNip6TfbZWFYZv4weSCyrw=","fVR30KYkDSf6Wvsw9TujzlqruhwIMbw1wHxa1z/mksA=","VpFNnyDFqynPhhZPcyqeWcncA9QmAv\u002BG3ez5PxfzaTQ=","EoVh8vBcGohUnEMEoZuTXrpZ9uBDHT19VmDHc/D\u002Bm0I=","eB7z8UswjcYO/RErEzjxxHwVLVba/7iPOUH17NS53Fw=","IdEjAFCVk3xZYjiEMESONot/jkvTj/gnwS5nnpGaIMc=","JVRe\u002Be2d47FunIfxVYRpqRFtljZ8gqrK3xMRy6TCd\u002BQ=","DQG0T8n9f5ohwv9akihU55D4/3WR7\u002BlDnvkdsAHHSgc=","VxDQNRQXYUU41o9SG4HrkKWR59FJIv8lmnwBolB/wE0=","x88k5Bg2fv\u002Bie1eIqFd4doOTQY0lwCNPv/5eJfhIK\u002Bw=","0Slg2/xnc5E9nXprYyph/57wQou\u002BhGSGgKchbo4aNOg="],"CachedAssets":{},"CachedCopyCandidates":{}}
+{"GlobalPropertiesHash":"gdYA/PLOQysRMD9wt3+IrqBqQw0g/GZFOcojepf8P6w=","FingerprintPatternsHash":"gq3WsqcKBUGTSNle7RKKyXRIwh7M8ccEqOqYvIzoM04=","PropertyOverridesHash":"8ZRc1sGeVrPBx4lD717BgRaQekyh78QKV9SKsdt638U=","InputHashes":["7Gcs8uTS1W2TjgmuuoBwaL/zy\u002B2wcKht3msEI7xtxEM=","UWedSjPPgrw4tts2Bk2ce0nYJfnBV9zMYOAjYg0PED8=","GecKXPxV0EAagvAtrRNTytwMtFCxZmgKm9sjLyEe8oI=","hf09a5b9bLKSNiG0xcVt876q/fUaHURnZieQui5FrSU=","hnhSRoeFpk3C6XWICUlX/lNip6TfbZWFYZv4weSCyrw=","fVR30KYkDSf6Wvsw9TujzlqruhwIMbw1wHxa1z/mksA=","bGtvAdvcs6Zz1qOTjdKz5gd/5jOpXDLvMjTZye3i/QI=","EoVh8vBcGohUnEMEoZuTXrpZ9uBDHT19VmDHc/D\u002Bm0I=","7gMXO5\u002Bhli7od21x4gC/qf3G6ddyyMyoSF6YFX9IaKg=","IdEjAFCVk3xZYjiEMESONot/jkvTj/gnwS5nnpGaIMc=","JVRe\u002Be2d47FunIfxVYRpqRFtljZ8gqrK3xMRy6TCd\u002BQ=","DQG0T8n9f5ohwv9akihU55D4/3WR7\u002BlDnvkdsAHHSgc=","VxDQNRQXYUU41o9SG4HrkKWR59FJIv8lmnwBolB/wE0=","x88k5Bg2fv\u002Bie1eIqFd4doOTQY0lwCNPv/5eJfhIK\u002Bw=","0Slg2/xnc5E9nXprYyph/57wQou\u002BhGSGgKchbo4aNOg="],"CachedAssets":{},"CachedCopyCandidates":{}}