Add codespell support (config, workflow to detect/not fix) and make it fix some typos (#7864)

* Add github action to codespell preview on push and PRs

* Add rudimentary codespell config

* [DATALAD RUNCMD] chore: run codespell throughout fixing a few typos interactively

=== Do not change lines below ===
{
 "chain": [],
 "cmd": "codespell -w -i 3 -C 4 ./apps/web/core/components/workspace/delete-workspace-form.tsx ./deployments/cli/community/README.md",
 "exit": 0,
 "extra_inputs": [],
 "inputs": [],
 "outputs": [],
 "pwd": "."
}
^^^ Do not change lines above ^^^

* Adjust coespell regex to ignore all camelCased words

* [DATALAD RUNCMD] chore: run codespell throughout fixing a few  new typos automagically

=== Do not change lines below ===
{
 "chain": [],
 "cmd": "codespell -w",
 "exit": 0,
 "extra_inputs": [],
 "inputs": [],
 "outputs": [],
 "pwd": "."
}
^^^ Do not change lines above ^^^

.codespellrc

@@ -0,0 +1,7 @@
+[codespell]
+# Ref: https://github.com/codespell-project/codespell#using-a-config-file
+skip = .git*,*.svg,i18n,*-lock.yaml,*.css,.codespellrc,migrations,*.js,*.map,*.mjs
+check-hidden = true
+# ignore all CamelCase and camelCase
+ignore-regex = \b[A-Za-z][a-z]+[A-Z][a-zA-Z]+\b
+ignore-words-list = tread