Add codespell pre-commit (#61)

Author: jarrodmillman

.pre-commit-config.yaml

@@ -32,6 +32,11 @@ repos:
         args: ["--fix", "--show-fixes", "--exit-non-zero-on-fix"]
       - id: ruff-format
 
+  - repo: https://github.com/codespell-project/codespell
+    rev: "193cd7d27cd571f79358af09a8fb8997e54f8fff" # frozen: v2.3.0
+    hooks:
+      - id: codespell
+
 ci:
   autofix_prs: false
   autofix_commit_msg: |

devstats/reports/prs_lifetime.md

@@ -2,7 +2,7 @@
 
 The following plot shows the "survival" of PRs over time.
 That means, the plot shows how many PRs are open for at least these many days.
-This is seperated into PRs that are merged and those that are still open
+This is separated into PRs that are merged and those that are still open
 (closed but unmerged PRs are not included currently).
 
 ```{code-cell}

devstats/reports/pull_requests/pr_lifetime.md

@@ -2,7 +2,7 @@
 
 The following plot shows the "survival" of PRs over time.
 That means, the plot shows how many PRs are open for at least these many days.
-This is seperated into PRs that are merged and those that are still open
+This is separated into PRs that are merged and those that are still open
 (closed but unmerged PRs are not included currently).
 
 ```{code-cell} ipython3