Add deletes and IDisposable ApiResult

[jsneedles]

• Adds access to delete endpoints for images
• Tweaks ApiResult<T> to be IDisposable because it has a HttpResponseMessage
• Clarifies docs

[github-actions]

Test results

141 tests   141 ✅  0s ⏱️
  1 suites    0 💤
  1 files      0 ❌

Results for commit e5f2d18.

[github-actions]

Test results

141 tests   141 ✅  0s ⏱️
  1 suites    0 💤
  1 files      0 ❌

Results for commit e5f2d18.

[github-actions]

Benchmark Results

HtmlCssToImage.Benchmarks.Benchmarks.HmacBenchmark

BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.4 LTS (Noble Numbat)
AMD EPYC 7763 2.71GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.302
  [Host]  : .NET 10.0.10 (10.0.10, 10.0.1026.32716), X64 RyuJIT x86-64-v3
  .NET 10 : .NET 10.0.10 (10.0.10, 10.0.1026.32716), X64 RyuJIT x86-64-v3

Job=.NET 10  EnvironmentVariables=DOTNET_TieredPGO=0  Runtime=.NET 10.0  
Server=True  MaxIterationCount=20  MaxWarmupIterationCount=5  
MinWarmupIterationCount=2  

Method	Mean	Error	StdDev	Ratio	Gen0	Allocated	Alloc Ratio
Hmac_Standard_Instance	1.992 μs	0.0057 μs	0.0051 μs	1.00	0.0648	696 B	1.00
HCTI_HmacToken_Optimized	1.835 μs	0.0050 μs	0.0044 μs	0.92	0.0134	152 B	0.22

HtmlCssToImage.Benchmarks.Benchmarks.MakeAuthHeaderBenchmark

BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.4 LTS (Noble Numbat)
INTEL XEON PLATINUM 8573C 2.30GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.302
  [Host]  : .NET 10.0.10 (10.0.10, 10.0.1026.32716), X64 RyuJIT x86-64-v4
  .NET 10 : .NET 10.0.10 (10.0.10, 10.0.1026.32716), X64 RyuJIT x86-64-v4

Job=.NET 10  EnvironmentVariables=DOTNET_TieredPGO=0  Runtime=.NET 10.0  
Server=True  MaxIterationCount=20  MaxWarmupIterationCount=5  
MinWarmupIterationCount=2  

Method	Mean	Error	StdDev	Ratio	Gen0	Allocated	Alloc Ratio
AuthHeader_Standard_StringFormat	85.23 ns	0.617 ns	0.578 ns	1.00	0.0370	376 B	1.00
HCTI_AuthHeader_Optimized	63.24 ns	0.326 ns	0.272 ns	0.74	0.0221	168 B	0.45

HtmlCssToImage.Benchmarks.Benchmarks.TemplateListUrlBenchmark

BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.4 LTS (Noble Numbat)
AMD EPYC 9V74 2.60GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.302
  [Host]  : .NET 10.0.10 (10.0.10, 10.0.1026.32716), X64 RyuJIT x86-64-v4
  .NET 10 : .NET 10.0.10 (10.0.10, 10.0.1026.32716), X64 RyuJIT x86-64-v4

Job=.NET 10  EnvironmentVariables=DOTNET_TieredPGO=0  Runtime=.NET 10.0  
Server=True  MaxIterationCount=20  MaxWarmupIterationCount=5  
MinWarmupIterationCount=2  

Method	templateId	nextPageStart	Mean	Error	StdDev	Ratio	Gen0	Allocated	Alloc Ratio
Basic	?	?	51.33 ns	0.327 ns	0.290 ns	1.00	0.0250	128 B	1.00
Optimized	?	?	18.66 ns	0.174 ns	0.154 ns	0.36	0.0125	64 B	0.50
Basic	t-daa(...)2efe6 [38]	?	67.59 ns	0.176 ns	0.138 ns	1.00	0.0308	312 B	1.00
Optimized	t-daa(...)2efe6 [38]	?	20.90 ns	0.052 ns	0.043 ns	0.31	0.0140	144 B	0.46
Basic	t-daa(...)2efe6 [38]	1735689600	60.63 ns	0.573 ns	0.536 ns	1.00	0.0291	296 B	1.00
Optimized	t-daa(...)2efe6 [38]	1735689600	31.13 ns	0.231 ns	0.205 ns	0.51	0.0185	192 B	0.65

HtmlCssToImage.Benchmarks.Benchmarks.UrlStringBuilderBenchmark

BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.4 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.302
  [Host]  : .NET 10.0.10 (10.0.10, 10.0.1026.32716), X64 RyuJIT x86-64-v3
  .NET 10 : .NET 10.0.10 (10.0.10, 10.0.1026.32716), X64 RyuJIT x86-64-v3

Job=.NET 10  EnvironmentVariables=DOTNET_TieredPGO=0  Runtime=.NET 10.0  
Server=True  MaxIterationCount=20  MaxWarmupIterationCount=5  
MinWarmupIterationCount=2  

Method	Mean	Error	StdDev	Ratio	Gen0	Allocated	Alloc Ratio
BuiltInHttpUtility	1,141.4 ns	10.97 ns	9.73 ns	1.00	0.3853	2976 B	1.00
BuiltInUri	1,049.2 ns	13.41 ns	12.55 ns	0.92	0.2728	2760 B	0.93
HctiQueryStringBuilder	773.7 ns	1.42 ns	1.33 ns	0.68	0.1459	744 B	0.25
HctiQueryStringBuilderDirect	725.5 ns	1.20 ns	1.00 ns	0.64	0.1459	744 B	0.25