Add undocumented vestigial directive kinds

See:
- https://stackoverflow.com/questions/48132954/undocumented-compilation-switches
- https://www.freepascal.org/docs-html/prog/progsu91.html#x99-980001.3.8
- https://www.freepascal.org/docs-html/prog/progsu21.html#x28-270001.2.21
- https://www.freepascal.org/docs-html/prog/progsu106.html#x114-1150001.3.23
- https://www.freepascal.org/docs-html/prog/progsu72.html#x79-780001.2.72

Author: cirras

CHANGELOG.md

@@ -22,13 +22,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - False positives from nested finally-except blocks in `RedundantJump`.
 - False positives around wrapped type declarations in `VisibilityKeywordIndentation`.
 - Several compiler directives were not being recognized:
+  - `E`
+  - `F`
+  - `K`
+  - `N`
+  - `S`
   - `ALLOWBIND`
   - `ALLOWISOLATION`
   - `HIGHENTROPYVA`
   - `HIGHCHARUNICODE`
   - `LARGEADDRESSAWARE`
   - `MAXPAGESIZE`
   - `NXCOMPAT`
+  - `STACKCHECKS`
+  - `STRINGCHECKS`
   - `TSAWARE`
   - `TYPEDADDRESS`
 

delphi-frontend/src/main/java/org/sonar/plugins/communitydelphi/api/directive/SwitchDirective.java

@@ -31,9 +31,11 @@ enum SwitchKind {
     DENYPACKAGEUNIT("denypackageunit"),
     DESIGNONLY("designonly"),
     OBJEXPORTALL("objexportall"),
+    EMULATECOPROCESSOR(null, 'e'),
     EXTENDEDSYNTAX("extendedsyntax", 'x'),
     EXTENDEDCOMPATIBILITY("extendedcompatibility"),
     EXCESSPRECISION("excessprecision"),
+    FAR(null, 'f'),
     HIGHENTROPYVA("highentropyva"),
     HIGHCHARUNICODE("highcharunicode"),
     HINTS("hints"),
@@ -45,12 +47,16 @@ enum SwitchKind {
     LOCALSYMBOLS("localsymbols", 'l'),
     LONGSTRINGS("longstrings", 'h'),
     METHODINFO("methodinfo"),
+    NUMERICPROCESSING(null, 'n'),
     NXCOMPAT("nxcompat"),
     OLDTYPELAYOUT("oldtypelayout"),
     OPENSTRINGS("openstrings", 'p'),
     OPTIMIZATION("optimization", 'o'),
     OVERFLOWCHECKS("overflowchecks", 'q'),
     SAFEDIVIDE("safedivide", 'u'),
+    SMARTCALLBACKS(null, 'k'),
+    STACKCHECKS("stackchecks", 's'),
+    STRINGCHECKS("stringchecks"),
     POINTERMATH("pointermath"),
     RANGECHECKS("rangechecks", 'r'),
     REALCOMPATIBILITY("realcompatibility"),