[spellcheck] Add integration with cspell (#12780)

Recently we started getting a lot of PRs fixing spelling errors in our
documents. Relevant Zulip discussion
[link](https://near.zulipchat.com/#narrow/channel/308695-nearone.2Fprivate/topic/external.20PRs.20fixing.20spelling.20issues)

This PR integrates a util called **cspell** into the github actions
([cspell-action](https://github.com/streetsidesoftware/cspell-action))
to automatically catch spelling errors.

There's a cspell.json config added that has a list of allowed words. And
new word found in the repo should be added there.

It is recommended that VS Code users install the [Code Spell
Checker](https://marketplace.visualstudio.com/items?itemName=streetsidesoftware.code-spell-checker).
A simple way to add new words to the config is to do `Ctrl/Cmd` + `.`
and add to the cspell.json config. Image below.


![image](https://github.com/user-attachments/assets/fcbea441-8445-4192-a612-c6a8ad1b9ed0)

Also to be notes, this cspell check runs on all touched file, so in case
you're touching a file that has a couple of spell problems, you may need
to add it to the cspell.json config.

.github/workflows/ci.yml

@@ -270,6 +270,12 @@ jobs:
           tool: just
       - run: just doctests
 
+  spellcheck:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: streetsidesoftware/cspell-action@v6
+
   check_cargo_deny:
     name: "Cargo Deny"
     runs-on: ubuntu-latest
@@ -388,7 +394,7 @@ jobs:
           pattern: coverage-codecov-*
           merge-multiple: true
       # Keep the number of uploads here in sync with codecov.yml’s after_n_build value
-      # codecov will send a comment only after having receidev this number of uploads.
+      # codecov will send a comment only after having received this number of uploads.
       - uses: codecov/codecov-action@eaaf4bedf32dbdc6b720b63067d99c4d77d6047d
         with:
           files: unit-linux.json

cspell.json

@@ -0,0 +1,104 @@
+{
+    "version": "0.2",
+    "ignorePaths": [],
+    "dictionaryDefinitions": [],
+    "dictionaries": [],
+    "words": [
+        "acks",
+        "actix",
+        "Aleksandr",
+        "allocs",
+        "archivals",
+        "backpressure",
+        "Banasik",
+        "bitvec",
+        "borsh",
+        "bufbuild",
+        "bytesize",
+        "chrono",
+        "Chudas",
+        "cloneable",
+        "Clippy",
+        "datas",
+        "dealloc",
+        "deallocate",
+        "deallocating",
+        "deallocation",
+        "demultiplexing",
+        "Deque",
+        "Diop",
+        "doctests",
+        "doomslug",
+        "fmtr",
+        "forknet",
+        "freelist",
+        "freelists",
+        "itertools",
+        "itoa",
+        "kickout",
+        "Kickouts",
+        "Logunov",
+        "memtrie",
+        "memtries",
+        "Merkle",
+        "merklize",
+        "metadatas",
+        "mocknet",
+        "multinode",
+        "nearcore",
+        "neard",
+        "nextest",
+        "nums",
+        "oneshot",
+        "Prefetcher",
+        "prefetchers",
+        "profraw",
+        "profraws",
+        "pytest",
+        "pytests",
+        "refcount",
+        "refcounted",
+        "refcounting",
+        "reindexing",
+        "repr",
+        "reshard",
+        "resharded",
+        "Resharder",
+        "Resharding",
+        "reshardings",
+        "respawn",
+        "respawns",
+        "rocksdb",
+        "RUSTC",
+        "RUSTFLAGS",
+        "rtype",
+        "serde",
+        "Shreyan",
+        "Spurio",
+        "stdx",
+        "structs",
+        "subslice",
+        "taiki",
+        "tempfile",
+        "TERA",
+        "testlib",
+        "testloop",
+        "testonly",
+        "TGAS",
+        "thiserror",
+        "udeps",
+        "uids",
+        "unittests",
+        "unstake",
+        "unsync",
+        "wacban",
+        "Waclaw",
+        "wasmer",
+        "wasms",
+        "yocto",
+        "zstd",
+        "Zulip"
+    ],
+    "ignoreWords": [],
+    "import": []
+}