adding hidden basic asp.net core backend (#30)

Base functionality:

    DB
    email sending
    user registration & login
    storing new characters and reading them back

Notes:

    Functionality is "hidden" with no links pointing to it.
    Most pages are scaffolded and not reviewed at all :(
    local Dev db setup is pushed to git
    NO local email setup :(

Kemkas.Web/Controllers/CharacterController.cs

@@ -0,0 +1,53 @@
+using System.ComponentModel.DataAnnotations;
+using Kemkas.Web.Db.Models;
+using Kemkas.Web.Services;
+using Kemkas.Web.Services.Character;
+using Kemkas.Web.ViewModels;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Kemkas.Web.Controllers;
+
+[ApiController]
+[Route("[controller]")]
+public class CharacterController(
+    ICharacterValidationService validationService,
+    ICharacterDtoToDbModelService dtoToDbModelService,
+    ICharacterDbModelToDtoService dbModelToDtoService,
+    ICharacterPersistenceService persistenceService)
+    : ControllerBase
+{
+    [HttpPost]
+    public async Task<ActionResult<Guid>> StoreNewCharacter([FromBody] CharacterDto dto)
+    {
+        var errors = validationService.Validate(dto);
+        if (errors != null)
+        {
+            return BadRequest(errors);
+        }
+
+        V1Karakter model;
+        try
+        {
+            model = dtoToDbModelService.Convert(dto);
+        }
+        catch (ValidationException ex)
+        {
+            return BadRequest(ex.Message);
+        }
+        var id = await persistenceService.StoreNewCharacter(model);
+        return id;
+    }
+
+    [HttpGet("{id:guid}")]
+    public async Task<ActionResult<CharacterDto>> GetCharacterById([FromRoute] Guid id)
+    {
+        var entity = await persistenceService.GetCharacterById(id);
+        if (entity is null)
+        {
+            return NotFound();
+        }
+
+        return dbModelToDtoService.Convert(entity);
+    }
+}