docs: avoid duplicate documentation

[vbreuss]

Replace the duplicated documentation in "00-index.md" with "{README}" which will be replaced by the content of README.md with Testably/aweXpect#721.

[Copilot]

Pull Request Overview

This PR removes duplicate documentation from the index file and replaces it with a placeholder that will be populated with README content. The change eliminates code duplication by centralizing documentation content in the README.md file.

• Removes 155 lines of duplicated HttpClient expectations documentation
• Replaces removed content with {README} placeholder for dynamic content injection

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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

See analysis details on SonarQube Cloud

[github-actions]

Test Results

   10 files  ±0     10 suites  ±0   6s ⏱️ -1s
  484 tests ±0    483 ✅ ±0  1 💤 ±0  0 ❌ ±0 
1 440 runs  ±0  1 439 ✅ ±0  1 💤 ±0  0 ❌ ±0 

Results for commit 74c229d. ± Comparison against base commit c0e2484.

[github-actions]

🚀 Benchmark Results

Details

BenchmarkDotNet v0.14.0, Ubuntu 24.04.2 LTS (Noble Numbat)

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

.NET SDK 9.0.304

[Host]     : .NET 8.0.19 (8.0.1925.36514), X64 RyuJIT AVX2

DefaultJob : .NET 8.0.19 (8.0.1925.36514), X64 RyuJIT AVX2

Method	Mean	Error	StdDev	Gen0	Allocated
Content_aweXpect	494.4 ns	2.92 ns	2.44 ns	0.0629	1064 B
SuccessStatusCode_aweXpect	268.9 ns	2.14 ns	1.90 ns	0.0496	832 B

[github-actions]

👽 Mutation Results

aweXpect.Web

Details

File	Score	Killed	Survived	Timeout	No Coverage	Ignored	Compile Errors	Total Detected	Total Undetected	Total Mutants

The final mutation score is NaN%

Coverage Thresholds: high:80 low:60 break:0

[github-actions]

This is addressed in release v1.4.0.