Increase timeout for NuGet package publishing to 600 seconds.

Update workflow to check for `patch/3.5.1` branch instead of `develop…

…/3.5.0` in release conditions

Update ElsaVersion to 3.5.0 in Directory.Packages.props

Update ElsaVersion to 3.5.0-rc4 in Directory.Packages.props

Update package versions for Elsa, MudBlazor, and Radzen.Blazor in Dir…

…ectory.Packages.props

Refactor null initializations and add support for edge vertices

Replace `default!` with explicit `null` assignments for clarity and uniformity in property initialization. Added a new `Vertices` property to `X6Edge` and updated `FlowchartMapper` to support mapping edge vertices, improving the flexibility of flowchart connections.

Remove Agent-related components and associated logic

Deleted all components, pages, validation logic, and styling related to the Agent module, including `Agent.razor`, `Agents.razor`, and validators. This change also removes agent APIs, references, and dependencies across the project.

Update package versions and align Elsa dependencies

Updated multiple package versions, including Microsoft.AspNetCore components to 9.0.4. Aligned Elsa dependencies by introducing ElsaExtensionsVersion and updating related package references to ensure consistency. This change ensures proper versioning and resolves potential mismatches in dependency management.

Update ElsaVersion to 3.4.0-rc2

Upgraded the ElsaVersion property from 3.4.0-preview.2883 to 3.4.0-rc2 in Directory.Build.props. This prepares the project for the release candidate version of Elsa.

Update branch grep in release workflow to match RC naming

Replaced "patch/3.4.0" with "rc/3.4.0" in the branch filtering step of the release workflow. This ensures compatibility with the revised branch naming convention for release candidates.