Javadoc text yaml wire v2

[peter-lawrey]

The net effect is that the most frequently used text/YAML classes now ship with concise, accurate JavaDocs, while all method signatures and bytecode remain unchanged.

What actually lands

Area	Key classes / files	Outcome
Core text-wire docs	TextWire, inner TextValueIn	Fresh Javadoc on parsing, strict-mode, file helpers, field reading, stop-char testers, padding & document markers.
YAML wire docs	YamlWire, YamlWireOut, inner YamlValueOut	Clarifies YAML tags, anchor/alias handling, timestamp comments, quoting/escaping logic and marshalling helpers.
Tokenisation & helpers	YamlTokeniser, YamlToken, TextStopCharTesters, Quotes	End-to-end explanation of token flow, context stack, literal blocks, and the stop-char utilities behind them.
Utilities	YamlLogging, YamlKeys	Describes runtime logging switches and offset-tracking used by the tokeniser.
Minor fixes	WireDumper, Wires, hasMetaDataPrefix() (TextWire)	Small clarifications / missing tags.