Add readme

[khamlyuk]

No description provided.

[DevExpressExampleBot]

Please correct the project and update this pull request by pushing a new commit.

[BUILDING ERROR]
	OUTPUT: C:\Temp\2c6aca2c-04eb-4f7a-91fb-17212d2f24c5\tempTestingCS\BlazorGridPopupEditFormCustomization\Components\Pages\Index.razor(9,13): warning RZ10012: Found markup element with unexpected name 'HeaderTemplate'. If this is intended to be a component, add a @using directive for its namespace. [C:\Temp\2c6aca2c-04eb-4f7a-91fb-17212d2f24c5\tempTestingCS\BlazorGridPopupEditFormCustomization\BlazorGridPopupEditFormCustomization.csproj]
C:\Temp\2c6aca2c-04eb-4f7a-91fb-17212d2f24c5\tempTestingCS\BlazorGridPopupEditFormCustomization\Components\Pages\Index.razor(14,13): warning RZ10012: Found markup element with unexpected name 'CellDisplayTemplate'. If this is intended to be a component, add a @using directive for its namespace. [C:\Temp\2c6aca2c-04eb-4f7a-91fb-17212d2f24c5\tempTestingCS\BlazorGridPopupEditFormCustomization\BlazorGridPopupEditFormCustomization.csproj]
C:\Temp\2c6aca2c-04eb-4f7a-91fb-17212d2f24c5\tempTestingCS\BlazorGridPopupEditFormCustomization\Components\Pages\Index.razor(19,9): error RZ9981: Unexpected closing tag 'DxGridCommandColumn' with no matching start tag. [C:\Temp\2c6aca2c-04eb-4f7a-91fb-17212d2f24c5\tempTestingCS\BlazorGridPopupEditFormCustomization\BlazorGridPopupEditFormCustomization.csproj]
C:\Temp\2c6aca2c-04eb-4f7a-91fb-17212d2f24c5\tempTestingCS\BlazorGridPopupEditFormCustomization\Components\Pages\Index.razor(19,11): error RZ1034: Found a malformed 'DxGridCommandColumn' tag helper. Tag helpers must have a start and end tag or be self closing. [C:\Temp\2c6aca2c-04eb-4f7a-91fb-17212d2f24c5\tempTestingCS\BlazorGridPopupEditFormCustomization\BlazorGridPopupEditFormCustomization.csproj]
C:\Temp\2c6aca2c-04eb-4f7a-91fb-17212d2f24c5\tempTestingCS\BlazorGridPopupEditFormCustomization\Components\Pages\Index.razor(16,50): error CS0103: The name 'context' does not exist in the current context [C:\Temp\2c6aca2c-04eb-4f7a-91fb-17212d2f24c5\tempTestingCS\BlazorGridPopupEditFormCustomization\BlazorGridPopupEditFormCustomization.csproj]

https://codecentralfarm.devexpress.devx/job/blazor-grid-popup-edit-form-customization_25.2.3+/3/console

[DevExpressExampleBot]

Please correct the project and update this pull request by pushing a new commit.

[BUILDING ERROR]
	OUTPUT: C:\Temp\ef7ea1e0-21dd-4e0a-a476-dc6dc2c26c58\tempTestingCS\BlazorGridPopupEditFormCustomization\Components\Pages\Index.razor(9,13): warning RZ10012: Found markup element with unexpected name 'HeaderTemplate'. If this is intended to be a component, add a @using directive for its namespace. [C:\Temp\ef7ea1e0-21dd-4e0a-a476-dc6dc2c26c58\tempTestingCS\BlazorGridPopupEditFormCustomization\BlazorGridPopupEditFormCustomization.csproj]
C:\Temp\ef7ea1e0-21dd-4e0a-a476-dc6dc2c26c58\tempTestingCS\BlazorGridPopupEditFormCustomization\Components\Pages\Index.razor(14,13): warning RZ10012: Found markup element with unexpected name 'CellDisplayTemplate'. If this is intended to be a component, add a @using directive for its namespace. [C:\Temp\ef7ea1e0-21dd-4e0a-a476-dc6dc2c26c58\tempTestingCS\BlazorGridPopupEditFormCustomization\BlazorGridPopupEditFormCustomization.csproj]
C:\Temp\ef7ea1e0-21dd-4e0a-a476-dc6dc2c26c58\tempTestingCS\BlazorGridPopupEditFormCustomization\Components\Pages\Index.razor(19,9): error RZ9981: Unexpected closing tag 'DxGridCommandColumn' with no matching start tag. [C:\Temp\ef7ea1e0-21dd-4e0a-a476-dc6dc2c26c58\tempTestingCS\BlazorGridPopupEditFormCustomization\BlazorGridPopupEditFormCustomization.csproj]
C:\Temp\ef7ea1e0-21dd-4e0a-a476-dc6dc2c26c58\tempTestingCS\BlazorGridPopupEditFormCustomization\Components\Pages\Index.razor(19,11): error RZ1034: Found a malformed 'DxGridCommandColumn' tag helper. Tag helpers must have a start and end tag or be self closing. [C:\Temp\ef7ea1e0-21dd-4e0a-a476-dc6dc2c26c58\tempTestingCS\BlazorGridPopupEditFormCustomization\BlazorGridPopupEditFormCustomization.csproj]
C:\Temp\ef7ea1e0-21dd-4e0a-a476-dc6dc2c26c58\tempTestingCS\BlazorGridPopupEditFormCustomization\Components\Pages\Index.razor(16,50): error CS0103: The name 'context' does not exist in the current context [C:\Temp\ef7ea1e0-21dd-4e0a-a476-dc6dc2c26c58\tempTestingCS\BlazorGridPopupEditFormCustomization\BlazorGridPopupEditFormCustomization.csproj]

https://codecentralfarm.devexpress.devx/job/blazor-grid-popup-edit-form-customization_25.2.3+/4/console