dev: Added initial version of the grpc api. Added relevant dummy settings to creds (they have no effect rn)

dev: Yt searches now INTERNALLY return multiple results but there is no way right now to paginate plain text results
dev: moved some stuff around

src/NadekoBot/Services/GrpcApi/ExprsSvc.cs

@@ -0,0 +1,73 @@
+using Google.Protobuf.WellKnownTypes;
+using Grpc.Core;
+using NadekoBot.Db.Models;
+using NadekoBot.Modules.NadekoExpressions;
+
+namespace NadekoBot.GrpcApi;
+
+public class ExprsSvc : GrpcExprs.GrpcExprsBase, INService
+{
+    private readonly NadekoExpressionsService _svc;
+
+    public ExprsSvc(NadekoExpressionsService svc)
+    {
+        _svc = svc;
+    }
+
+    public override async Task<AddExprReply> AddExpr(AddExprRequest request, ServerCallContext context)
+    {
+        NadekoExpression expr;
+        if (!string.IsNullOrWhiteSpace(request.Expr.Id))
+        {
+            expr = await _svc.EditAsync(request.GuildId,
+                new kwum(request.Expr.Id),
+                request.Expr.Response,
+                request.Expr.Ca,
+                request.Expr.Ad,
+                request.Expr.Dm);
+        }
+        else
+        {
+            expr = await _svc.AddAsync(request.GuildId,
+                request.Expr.Trigger,
+                request.Expr.Response,
+                request.Expr.Ca,
+                request.Expr.Ad,
+                request.Expr.Dm);
+        }
+
+
+        return new AddExprReply()
+        {
+            Id = new kwum(expr.Id).ToString(),
+            Success = true,
+        };
+    }
+
+    public override async Task<GetExprsReply> GetExprs(GetExprsRequest request, ServerCallContext context)
+    {
+        var (exprs, totalCount) = await _svc.FindExpressionsAsync(request.GuildId, request.Query, request.Page);
+
+        var reply = new GetExprsReply();
+        reply.TotalCount = totalCount;
+        reply.Expressions.AddRange(exprs.Select(x => new ExprDto()
+        {
+            Ad = x.AutoDeleteTrigger,
+            At = x.AllowTarget,
+            Ca = x.ContainsAnywhere,
+            Dm = x.DmResponse,
+            Response = x.Response,
+            Id = new kwum(x.Id).ToString(),
+            Trigger = x.Trigger,
+        }));
+
+        return reply;
+    }
+
+    public override async Task<Empty> DeleteExpr(DeleteExprRequest request, ServerCallContext context)
+    {
+        await _svc.DeleteAsync(request.GuildId, new kwum(request.Id));
+
+        return new Empty();
+    }
+}