Fix: update/add missing demo samples (#4975)

* Rename unmatched demo samples

 + Remove nix override thing

* Add undeclared impls to modelist

* Backfill samples for django, txt, mips

Author: ParkerM

demo/kitchen-sink/doclist.js

@@ -48,7 +48,6 @@ var docs = {
 
     "docs/c9search.c9search_results": "C9 Search Results",
     "docs/mel.mel": "MEL",
-    "docs/Nix.nix": "Nix"
 };
 
 var ownSource = {

demo/kitchen-sink/docs/django.html

@@ -0,0 +1,7 @@
+{% extends "base.html" %}
+
+{% block title %}Ace Django Template{% endblock %}
+
+{% block content %}
+  <h1>Hello, {{ name|default:"World" }}!</h1>
+{% endblock %}

demo/kitchen-sink/docs/fortran.f90 demo/kitchen-sink/docs/fortran.f

@@ -0,0 +1,18 @@
+# Original source from https://eng.libretexts.org
+# Kann, Charles W., "Introduction To MIPS Assembly Language Programming" (2015). Open Textbooks. 2.
+# https://cupola.gettysburg.edu/oer/2
+
+# Program File: Program2-1.asm
+# Author: Charles Kann
+# Purpose: First program, Hello World
+.text                   # Define the program instructions.
+main:                   # Label to define the main program.
+    li $v0,4            # Load 4 into $v0 to indicate a print string.
+    la $a0, greeting    # Load the address of the greeting into $a0.
+    syscall             # Print greeting. The print is indicated by
+                        # $v0 having a value of 4, and the string to
+                        # print is stored at the address in $a0.
+    li $v0, 10          # Load a 10 (halt) into $v0.
+    syscall             # The program ends.
+.data                   # Define the program data.
+greeting: .asciiz "Hello World" #The string to print.

demo/kitchen-sink/docs/Haxe.hx demo/kitchen-sink/docs/haxe.hx

@@ -0,0 +1,9 @@
+This is just some text!
+
+//   These
+  #    are
+    --   not
+      <!-- comments -->
+        (but indent actions work)
+
+This is just some text!

demo/kitchen-sink/docs/Jack.jack demo/kitchen-sink/docs/jack.jack

@@ -127,6 +127,7 @@ var supportedModes = {
     LiveScript:  ["ls"],
     Log:         ["log"],
     LogiQL:      ["logic|lql"],
+    Logtalk:     ["lgt"],
     LSL:         ["lsl"],
     Lua:         ["lua"],
     LuaPage:     ["lp"],
@@ -190,6 +191,7 @@ var supportedModes = {
     snippets:    ["snippets"],
     Soy_Template:["soy"],
     Space:       ["space"],
+    SPARQL:      ["rq"],
     SQL:         ["sql"],
     SQLServer:   ["sqlserver"],
     Stylus:      ["styl|stylus"],
@@ -202,6 +204,7 @@ var supportedModes = {
     Textile:     ["textile"],
     Toml:        ["toml"],
     TSX:         ["tsx"],
+    Turtle:      ["ttl"],
     Twig:        ["twig|swig"],
     Typescript:  ["ts|typescript|str"],
     Vala:        ["vala"],