docs: document prerequisites (installed .NET 10 SDK)

[vbreuss]

This PR adds documentation about prerequisites for using Mockolate, specifically clarifying that the .NET 10 SDK must be installed to build and compile projects using Mockolate, even though the library supports multiple framework versions.

Changes:

• Added prerequisite section explaining .NET 10 SDK requirement
• Renumbered subsequent Getting Started steps accordingly
• Reformatted multi-line descriptions for better readability

[Copilot]

Pull request overview

This PR adds documentation about prerequisites for using Mockolate, specifically clarifying that the .NET 10 SDK must be installed to build and compile projects using Mockolate, even though the library supports multiple framework versions.

Changes:

• Added prerequisite section explaining .NET 10 SDK requirement
• Renumbered subsequent Getting Started steps accordingly
• Reformatted multi-line descriptions for better readability

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
README.md	Added prerequisites section before installation instructions and renumbered steps
Docs/pages/00-index.md	Added identical prerequisites section to documentation pages

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

[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

See analysis details on SonarQube Cloud

[github-actions]

Test Results

    21 files  ±0      21 suites  ±0   5m 39s ⏱️ +37s
 2 518 tests ±0   2 517 ✅ ±0  1 💤 ±0  0 ❌ ±0 
16 807 runs  ±0  16 806 ✅ ±0  1 💤 ±0  0 ❌ ±0 

Results for commit 0ec6df4. ± Comparison against base commit 2852edd.

[github-actions]

🚀 Benchmark Results

Details

BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.3 LTS (Noble Numbat)

AMD EPYC 7763 3.16GHz, 1 CPU, 4 logical and 2 physical cores

.NET SDK 10.0.102

[Host] : .NET 10.0.2 (10.0.2, 10.0.225.61305), X64 RyuJIT x86-64-v3
Job=InProcess  Toolchain=InProcessEmitToolchain  IterationCount=15

LaunchCount=1  WarmupCount=10

Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Simple_Mockolate	1.537 μs	0.0077 μs	0.0068 μs	0.2270	-	3.73 KB
Simple_Moq	174.748 μs	0.6186 μs	0.5165 μs	0.4883	-	14.55 KB
Simple_NSubstitute	5.593 μs	0.0160 μs	0.0150 μs	0.5569	0.0076	9.14 KB
Simple_FakeItEasy	6.252 μs	0.0168 μs	0.0157 μs	0.4959	-	8.11 KB

[github-actions]

This is addressed in release v1.2.0.