lsp: added decorations to state updates;

lsp: added delay to dynamic_output updates after a set_margin;

lsp: added conversion of symbols for dynamic output so that decoration ranges consider vscode_unicode_symbols setting;

lsp: unified PIDE/decorations and dynamic output decorations format;

vscode: changed test_string to "mix" to be consistent with jEdit;

lsp: added decorations to dynamic output;

lsp: force update after state_set_margin;

vscode: added dynamic and state output set margin messages to vscode extension;

lsp: made margins synchronized;

lsp: added separation for non-html output and state;

lsp: tuned;

lsp: clarified preview_request;

lsp: added Symbols_Request;

lsp: added Output_Set_Margin and State_Set_Margin Notifications;

lsp: changed State_Init notification into a request and removed State_Init_Response;

lsp: tuned;

lsp: updated ErrorCodes;

lsp: added State and Dynamic Output html_output and margin handling;

lsp: added vscode_html_output option;

tuned formatting;

lsp: partially revert c0388fbd8096 to get decorations for all keywords;

lsp: added State_Init_Response message;

lsp: removed change_document normalization because it causes desyncs;

clarified inner-syntax markup, notably for enumerations: prefer "notation=mixfix" over "entity" via 'syntax_consts' (see also 70076ba563d2);

less markup: prefer "notatation" over "entity";

clarify comparison of output: ignore token positions, which are somewhat accidental;

clarified order of markup: more uniform input vs. output;

misc tuning;