add hint on restriction of AlignDeclarationsRule (SAP#100)

com.sap.adt.abapcleaner/src/com/sap/adt/abapcleaner/rules/alignment/AlignDeclarationsRule.java

@@ -131,6 +131,9 @@ public boolean isTableForStructure(AlignTable table) {
 	@Override
 	public String getDescription() { return "Aligns both chains and consecutive declaration lines of CONSTANTS, DATA, FIELD-SYMBOLS, and TYPES."; }
 
+	@Override
+	public String getHintsAndRestrictions() { return "If line length is exceeded, VALUE clauses can be moved to the next line, unless they are followed by further code or comments that must be aligned."; }
+
 	@Override
 	public LocalDate getDateCreated() { return LocalDate.of(2021, 1, 8); }