Example blocks should not crash the whole build on parse errors

[asinghvi17]

for k in keys
    k !in acceptable_keys && do_something()
end

is an example of code that does not parse correctly. In an @example block

Warning: failed to parse exception in src/somefile.md
  exception = 
    ParseError:
    # Error @ none:16:15
        for (param, value) in params
    #             ┌──────────────────────────
            param !in default_keys && error(...)
    #────────────────────────────────────────────────────────────────────────┘ ── Expected `end`
ERROR: LoadError: AssertionError: Issue at #= somefile.md:109 =#:
Stacktrace:
  [1] parseblock(code::String, doc::Documenter.Document, file::String; skip::Int64, keywords::Bool, raise::Bool, linenumbernode::LineNumberNode)
    @ Documenter ~/.julia/packages/Documenter/iRt2s/src/utilities/utilities.jl:172
  [2] parseblock
    @ ~/.julia/packages/Documenter/iRt2s/src/utilities/utilities.jl:138 [inlined]
  [3] #parseblock#21
    @ ~/.julia/packages/Documenter/iRt2s/src/documents.jl:80 [inlined]
  [4] runner(::Type{Documenter.Expanders.ExampleBlocks}, node::MarkdownAST.Node{Nothing}, page::Documenter.Page, doc::Documenter.Document)
    @ Documenter ~/.julia/packages/Documenter/iRt2s/src/expander_pipeline.jl:851
  [5] dispatch(::Type{Documenter.Expanders.ExpanderPipeline}, ::MarkdownAST.Node{Nothing}, ::Vararg{Any})
    @ Documenter.Selectors ~/.julia/packages/Documenter/iRt2s/src/utilities/Selectors.jl:170
  [6] expand(doc::Documenter.Document)
    @ Documenter ~/.julia/packages/Documenter/iRt2s/src/expander_pipeline.jl:59
  [7] runner(::Type{Documenter.Builder.ExpandTemplates}, doc::Documenter.Document)
    @ Documenter ~/.julia/packages/Documenter/iRt2s/src/builder_pipeline.jl:224
  [8] dispatch(::Type{Documenter.Builder.DocumentPipeline}, x::Documenter.Document)
    @ Documenter.Selectors ~/.julia/packages/Documenter/iRt2s/src/utilities/Selectors.jl:170
  [9] #88
    @ ~/.julia/packages/Documenter/iRt2s/src/makedocs.jl:275 [inlined]
 [10] withenv(::Documenter.var"#88#90"{Documenter.Document}, ::Pair{String, Nothing}, ::Vararg{Pair{String, Nothing}})
    @ Base ./env.jl:265
 [11] #87
    @ ~/.julia/packages/Documenter/iRt2s/src/makedocs.jl:274 [inlined]
 [12] cd(f::Documenter.var"#87#89"{Documenter.Document}, dir::String)
    @ Base.Filesystem ./file.jl:112
 [13] makedocs(; debug::Bool, format::MarkdownVitepress, kwargs::@Kwargs{modules::Vector{Module}, authors::String, sitename::String, pages::Vector{Pair{String, Any}}, warnonly::Bool, clean::Bool})
    @ Documenter ~/.julia/packages/Documenter/iRt2s/src/makedocs.jl:273
 

Error: Process completed with exit code 1.

This should probably not completely crash? (Example is sanitized)

[mortenpi]

Yea, I agree. I think should be handled like normal errors.