Reserve LuceneDev6001-6003 and add initial entries for string/span/char analyzer rules

Author: NehanPathan

src/Lucene.Net.CodeAnalysis.Dev/AnalyzerReleases.Unshipped.md

@@ -1,10 +1,10 @@
 ### New Rules
 
-| Rule ID       | Category | Severity | Notes                                                                                                                                           |
-| ------------- | -------- | -------- | ----------------------------------------------------------------------------------------------------------------------------------------------- |
-| LuceneDev1007 | Design   | Warning  | Generic Dictionary<TKey, TValue> indexer should not be used to retrieve values because it may throw KeyNotFoundException (value type value)     |
-| LuceneDev1008 | Design   | Warning  | Generic Dictionary<TKey, TValue> indexer should not be used to retrieve values because it may throw KeyNotFoundException (reference type value) |
-| LuceneDev6000 | Usage    | Info     | IDictionary indexer may be used to retrieve values, but must be checked for null before using the value                                         |
-| LuceneDev6001 | Usage    | Error    | String overloads of StartsWith/EndsWith/IndexOf/LastIndexOf must be called with StringComparison.Ordinal or StringComparison.OrdinalIgnoreCase  |
-| LuceneDev6002 | Usage    | Warning  | Span overloads of StartsWith/EndsWith/IndexOf/LastIndexOf should not pass non-Ordinal StringComparison                                          |
-| LuceneDev6003 | Usage    | Info     | Single-character string arguments should use the char overload of StartsWith/EndsWith/IndexOf/LastIndexOf instead of a string                   |
+ Rule ID       | Category | Severity | Notes
+---------------|----------|----------|-----------------------------------------------------------------------------------------------------------------------------------------------------------
+ LuceneDev1007 | Design   | Warning  | Generic Dictionary<TKey, TValue> indexer should not be used to retrieve values because it may throw KeyNotFoundException (value type value)
+ LuceneDev1008 | Design   | Warning  | Generic Dictionary<TKey, TValue> indexer should not be used to retrieve values because it may throw KeyNotFoundException (reference type value)
+ LuceneDev6000 | Usage    | Info     | IDictionary indexer may be used to retrieve values, but must be checked for null before using the value
+ LuceneDev6001 | Usage    | Error    | String overloads of StartsWith/EndsWith/IndexOf/LastIndexOf must be called with StringComparison.Ordinal or StringComparison.OrdinalIgnoreCase
+ LuceneDev6002 | Usage    | Warning  | Span overloads of StartsWith/EndsWith/IndexOf/LastIndexOf should not pass non-Ordinal StringComparison
+ LuceneDev6003 | Usage    | Info     | Single-character string arguments should use the char overload of StartsWith/EndsWith/IndexOf/LastIndexOf instead of a string