feat(mongodb): add db.getCollectionInfos() support (#51)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: h3n4l

mongodb/MongoShellLexer.g4

@@ -17,6 +17,7 @@ FALSE: 'false';
 NULL: 'null';
 GET_COLLECTION: 'getCollection';
 GET_COLLECTION_NAMES: 'getCollectionNames';
+GET_COLLECTION_INFOS: 'getCollectionInfos';
 
 // Helper function names (recognized as distinct tokens)
 OBJECT_ID: 'ObjectId';

mongodb/MongoShellParser.g4

@@ -32,10 +32,11 @@ shellCommand
     | SHOW COLLECTIONS                          # showCollections
     ;
 
-// Database statements: db.collection.method(...) or db.getCollectionNames()
+// Database statements: db.collection.method(...) or db.getCollectionNames() or db.getCollectionInfos()
 dbStatement
-    : DB DOT GET_COLLECTION_NAMES LPAREN RPAREN methodChain?    # getCollectionNames
-    | DB collectionAccess methodChain                           # collectionOperation
+    : DB DOT GET_COLLECTION_NAMES LPAREN RPAREN methodChain?                    # getCollectionNames
+    | DB DOT GET_COLLECTION_INFOS LPAREN arguments? RPAREN methodChain?         # getCollectionInfos
+    | DB collectionAccess methodChain                                           # collectionOperation
     ;
 
 // Collection access patterns
@@ -239,6 +240,7 @@ identifier
     | PROJECT
     | GET_COLLECTION
     | GET_COLLECTION_NAMES
+    | GET_COLLECTION_INFOS
     | OBJECT_ID
     | ISO_DATE
     | DATE

mongodb/mongoshell_lexer.go

@@ -149,6 +149,9 @@ func TestCollectionAccess(t *testing.T) {
 		`db["user-logs"].find()`,
 		`db.getCollection("my.collection").find()`,
 		`db.getCollectionNames()`,
+		`db.getCollectionInfos()`,
+		`db.getCollectionInfos({ name: "users" })`,
+		`db.getCollectionInfos({}, { nameOnly: true })`,
 	}
 
 	for _, tc := range tests {