Add comprehensive documentation for QueryableExtensions and library utilities

[Copilot]

QueryableExtensions and other recently added utilities lacked documentation. Updated README and created detailed guides in /docs.

Changes

README.md

• Added Documentation section with links to detailed guides
• Reorganized utilities into Provider Interfaces, Services, Extension Methods, and Constants
• Added inline examples for QueryableExtensions, EnumExtensions, IdentityExtensions, encryption services, DatabaseEnvironmentModelFactory, and Timezones
• Fixed typo: IDirectory Provider → IDirectoryProvider

docs/ folder (new)

• docs/README.md - Documentation index with navigation
• docs/QueryableExtensions.md - WhereIf, OrderByIf, OrderByDescendingIf, GetPage, DistinctBy with real-world scenarios
• docs/EnumExtensions.md - GetDisplayNameOrStringValue, GetDisplayName, HasDisplayName with UI integration examples
• docs/EncryptionServices.md - Both AesEncryptionService and AesDerivedKeyEncryptionService with security best practices

Example Usage

// QueryableExtensions - conditional querying
var users = dbContext.Users
    .WhereIf(activeOnly, u => u.IsActive)
    .WhereIf(!string.IsNullOrEmpty(searchTerm), u => u.Name.Contains(searchTerm))
    .OrderByIf(sortByName, u => u.Name)
    .GetPage(pageNumber, pageSize)
    .ToList();

// EnumExtensions - display attributes
var displayName = Status.Active.GetDisplayNameOrStringValue(); // "Active User"

// IdentityExtensions - claims
var email = User.Identity.GetClaimValue(ClaimTypes.Email);

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Update Readme Documentation</issue_title>
<issue_description>We have recently added QueryableExtensions to this project, and other additional methods.

Update the readme.md file, and add documentation to it, or any additional files linked to the /docs folder as needed to document this library.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Update Readme Documentation #73

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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