fix(language): fixed Marathi not showing up in the language list (@agokule) (#6395)

### Description

Right now, the Marathi language should exist on Monkeytype (there is a
`marathi.json` file in both `frontend/static/quotes` and
`frontend/static/languages`) but it doesn't. This is probably because it
isn't in the `_list.json` and `_groups.json` file, so I added it to
those files.

This is related to #4174.

---------

Co-authored-by: Atharv Gokule <106445077+username121546434@users.noreply.github.com>

frontend/static/languages/_groups.json

@@ -92,6 +92,10 @@
     "name": "khmer",
     "languages": ["khmer"]
   },
+  {
+    "name": "marathi",
+    "languages": ["marathi"]
+  },
   {
     "name": "chinese",
     "languages": [

frontend/static/languages/_list.json

@@ -192,6 +192,7 @@
   ,"persian_5k"
   ,"persian_20k"
   ,"persian_romanized"
+  ,"marathi"
   ,"kazakh"
   ,"kazakh_1k"
   ,"vietnamese"

frontend/static/languages/marathi.json

@@ -26,15 +26,12 @@
     "परंतु",
     "काय",
     "काही",
-    "आहे",
     "आपण",
     "किंवा",
-    "होते",
     "अगोदर",
     "निर्देश",
     "च्या",
     "आणि",
-    "एक",
     "मध्ये",
     "आम्ही",
     "हे",
@@ -42,16 +39,13 @@
     "शकता",
     "बाहेर",
     "इतर",
-    "होते",
     "जे",
-    "करू",
     "त्यांच्या",
     "वेळ",
     "तर",
     "खाईन",
     "कसे",
     "म्हणाला",
-    "एक",
     "प्रत्येक",
     "सांगा",
     "नाही",
@@ -75,7 +69,6 @@
     "जोडा",
     "अगदी",
     "जमीन",
-    "येथे",
     "पाहिजे",
     "मोठा",
     "उच्च",
@@ -124,7 +117,6 @@
     "वर्ष",
     "आले",
     "शो",
-    "प्रत्येक",
     "चांगले",
     "मला",
     "देणे",
@@ -132,7 +124,6 @@
     "अंतर्गत",
     "नाव",
     "फार",
-    "द्वारे",
     "फक्त",
     "फॉर्म",
     "वाक्य",
@@ -164,13 +155,11 @@
     "मार्ग",
     "बद्दल",
     "अनेक",
-    "नंतर",
     "त्यांना",
     "लेखन",
     "बरी होईल",
     "जसे",
     "त्यामुळे",
-    "या",
     "तिच्या",
     "लांब",
     "करा",
@@ -178,17 +167,14 @@
     "पहा",
     "त्याला",
     "दोन",
-    "आहे",
     "पाहण्यासारखे",
     "अधिक",
     "दिवस",
     "शक्य झाले",
     "जा",
     "येणे",
-    "केले",
     "संख्या",
     "आवाज पातळी",
-    "नाही",
     "सर्वात",
     "लोक",
     "माझा",
@@ -202,6 +188,21 @@
     "असू शकेल",
     "खाली",
     "लवकरच",
-    "पाहिजे"
+    "गरुड",
+    "डोंगर",
+    "ओळख",
+    "खेळायला",
+    "संध्याकाळ",
+    "प्रवास",
+    "शिकणे",
+    "सांगितले",
+    "वाढवा",
+    "समस्या",
+    "शाळा",
+    "रंग",
+    "सूर्य",
+    "झाड",
+    "अन्न",
+    "आकाश"
   ]
 }