New docs for context creation and initialization

Draft

Fixes #594
Part of #876
Fixes #1390
Fixes #1923
Fixes #2241
Part of #2523
Part of #2549
Part of #1832

Let's discuss where this page should go and what goes underneath it. We had previously decided to keep this in Miscellaneous, but I now believe this would be better as a top-level item with the following subsections to go into more detail:

- DbContext lifetime, configuration and initialization
  - Overview
  - Connection strings
  - Using dependency injection
  - Connection resiliency
  - Context pooling

entity-framework/core/miscellaneous/configuring-dbcontext.md

@@ -279,11 +279,11 @@ The following table contains examples of common methods called on `DbContextOpti
 | <xref:Microsoft.EntityFrameworkCore.DbContextOptionsBuilder.EnableDetailedErrors%2A>       | More detailed query errors (at the expense of performance)  | [_Logging, events, and diagnostics_](xref:core/miscellaneous/logging)
 | <xref:Microsoft.EntityFrameworkCore.DbContextOptionsBuilder.ConfigureWarnings%2A>          | Ignore or throw for warnings and other events               | [_Logging, events, and diagnostics_](xref:core/miscellaneous/logging)
 | <xref:Microsoft.EntityFrameworkCore.DbContextOptionsBuilder.AddInterceptors%2A>            | Registers EF Core interceptors                              | [_Logging, events, and diagnostics_](xref:core/miscellaneous/logging)
-| <xref:Microsoft.EntityFrameworkCore.ProxiesExtensions.UseLazyLoadingProxies>               | Use dynamic proxies for lazy-loading                        | [_Lazy loading_)](xref:core/querying/related-data/lazy)
+| <xref:Microsoft.EntityFrameworkCore.ProxiesExtensions.UseLazyLoadingProxies%2A>            | Use dynamic proxies for lazy-loading                        | [_Lazy loading_)](xref:core/querying/related-data/lazy)
 | `UseChangeTrackingProxies()` <!-- Issue #2748 -->                                          | Use dynamic proxies for change-tracking                     | Coming soon...
 
 > [!NOTE]
-> <xref:Microsoft.EntityFrameworkCore.ProxiesExtensions.UseLazyLoadingProxies%2A> and <xref:Microsoft.EntityFrameworkCore.ProxiesExtensions.UseChangeTrackingProxies%2A> are extension methods from the [Microsoft.EntityFrameworkCore.Proxies](https://www.nuget.org/packages/Microsoft.EntityFrameworkCore.Proxies/) NuGet package. This kind of ".UseSomething()" call is the recommended way to configure and/or use EF Core extensions contained in other packages.
+> <xref:Microsoft.EntityFrameworkCore.ProxiesExtensions.UseLazyLoadingProxies%2A> and `UseChangeTrackingProxies()` <!-- Issue #2748 --> are extension methods from the [Microsoft.EntityFrameworkCore.Proxies](https://www.nuget.org/packages/Microsoft.EntityFrameworkCore.Proxies/) NuGet package. This kind of ".UseSomething()" call is the recommended way to configure and/or use EF Core extensions contained in other packages.
 
 ### `DbContextOptions` verses `DbContextOptions<TContext>`