docs: Replace old Sphinx docs with new MkDocs Material documentation

- Remove old Sphinx/RST documentation (docs/)
- Rename docs2/ to docs/ as the primary documentation source
- Update mkdocs.yml docs_dir from docs2 to docs
- Update .readthedocs.yaml requirements path
- Update contributing/development.md references

Author: TrentHouliston

.readthedocs.yaml

@@ -15,4 +15,4 @@ mkdocs:
 
 python:
   install:
-    - requirements: docs2/requirements.txt
+    - requirements: docs/requirements.txt

.vscode/settings.json

@@ -15,5 +15,68 @@
   "sonarlint.connectedMode.project": {
     "connectionId": "fastcode",
     "projectKey": "Fastcode_NUClear"
+  },
+  "files.associations": {
+    "__bit_reference": "cpp",
+    "__config": "cpp",
+    "__hash_table": "cpp",
+    "__locale": "cpp",
+    "__node_handle": "cpp",
+    "__split_buffer": "cpp",
+    "__threading_support": "cpp",
+    "__tree": "cpp",
+    "__verbose_abort": "cpp",
+    "array": "cpp",
+    "bitset": "cpp",
+    "cctype": "cpp",
+    "charconv": "cpp",
+    "clocale": "cpp",
+    "cmath": "cpp",
+    "complex": "cpp",
+    "condition_variable": "cpp",
+    "csignal": "cpp",
+    "cstdarg": "cpp",
+    "cstddef": "cpp",
+    "cstdint": "cpp",
+    "cstdio": "cpp",
+    "cstdlib": "cpp",
+    "cstring": "cpp",
+    "ctime": "cpp",
+    "cwchar": "cpp",
+    "cwctype": "cpp",
+    "deque": "cpp",
+    "execution": "cpp",
+    "fstream": "cpp",
+    "future": "cpp",
+    "initializer_list": "cpp",
+    "iomanip": "cpp",
+    "ios": "cpp",
+    "iosfwd": "cpp",
+    "iostream": "cpp",
+    "istream": "cpp",
+    "limits": "cpp",
+    "list": "cpp",
+    "locale": "cpp",
+    "map": "cpp",
+    "mutex": "cpp",
+    "new": "cpp",
+    "optional": "cpp",
+    "ostream": "cpp",
+    "ratio": "cpp",
+    "regex": "cpp",
+    "set": "cpp",
+    "sstream": "cpp",
+    "stack": "cpp",
+    "stdexcept": "cpp",
+    "streambuf": "cpp",
+    "string": "cpp",
+    "string_view": "cpp",
+    "tuple": "cpp",
+    "typeindex": "cpp",
+    "typeinfo": "cpp",
+    "unordered_map": "cpp",
+    "variant": "cpp",
+    "vector": "cpp",
+    "algorithm": "cpp"
   }
 }