docs: fix inaccurate README examples and comprehensively correct docs

[asulwer]

README:

• Workflow.Compile takes parameters only (it owns its compiler); removed the
  incorrect compiler argument in the Quick Start and JSON examples.
• Rewrote the dependency-chaining example to the real mutation-based pattern
  (RuleContext is host-side only, not available inside expression strings).

docs/ comprehensive review fixes (all verified against source):

• Replaced every broken context.GetResult/GetValue/TryGetValue-inside-expression
  example with the parameter-mutation chaining pattern (rule-action-chaining,
  examples/index, security, api/rulecontext).
• rule-predicates: replaced fictional predicates with the 27 real factory methods.
• testing-framework: corrected nonexistent members (Passed/ErrorMessage/
  ElapsedMilliseconds/ExpectValueOfType/ExpectNoException/suite.Results), added
  missing compiler args, fixed expected exception type to InvalidOperationException.
• examples/index: LoadFromFile -> LoadWorkflowFromFile, RoslynRules.Extensions ->
  RoslynRules.Json, result.Data -> result.Value, corrected ValidationErrorType list.
• aot-compatibility: removed nonexistent LoadSnapshots/SaveSnapshots and private
  GetExecutionOrder; use SnapshotManager flow.
• api: fixed compiled-delegate, rule-templates, assemblyreferenceprovider
  (AllowAssembly), exceptions (dropped RuleExecutionException, added
  AotCompatibilityException), delegate-types (up to 16 params), iruleengine,
  ruleresult (AllFailures is non-recursive), json-serialization markup.
• Reclassified internal CompiledDelegate out of public API tables; qualified the
  "no DynamicInvoke" claim to single-parameter rules.
• Fixed systemic broken links (api back-link ../api-reference.md, dead snapshot
  and rule-test links, SECURITY.md paths); made compile snippets self-contained.

Co-Authored-By: Claude Opus 4.8 noreply@anthropic.com
Claude-Session: https://claude.ai/code/session_016biLJMscUzQLmQ25aEhhxt