Add .git-blame-ignore-revs

The added `.git-blame-ignore-revs` file can be used with `git blame`
to ignore certain commits when blaming, which is useful
when we want to commit large formatting changes without messing up
the output of `git blame`. Also, by adding this file to the repo
`GitHub` will pick it up automatically and ignore the listed commits.

Usage:
`git blame --ignore-revs-file .git-blame-ignore-revs somefile.ext`
However, it is highly recommended that you configure `git blame`
locally to always ignore the commits specified in
`.git-blame-ignore-revs`. You can do this by running the following
from the repository's root:
`git config blame.ignoreRevsFile .git-blame-ignore-revs`.
From then on, you can just run `git blame somefile.ext` and ignoring
will also work for git porcelains and integrations automatically.

Author: Lucsanszky

Diff for: .git-blame-ignore-revs

@@ -0,0 +1,36 @@
+### NOTE
+# Run `git config blame.ignoreRevsFile .git-blame-ignore-revs`
+# from the repository's root to tell `git blame` to ignore
+# the commits below.
+
+# Fourmolize with new version of fourmolu-0.13.1.0
+# CommitDate: Wed Jul 19 17:44:40 2023 +0100
+cda8146aee32e3c282f88bcd715cbf0e195287b2
+
+# Fourmolize!
+# CommitDate: Wed Dec 28 13:59:33 2022 +0300
+9ff8a727d2d5ee4a6fdf6bb0eab4e139c545cc7c
+
+# Ormolize with ormolu-0.4.0.0
+# CommitDate: Fri Mar 4 02:05:06 2022 +0300
+7599e835f8c6a437e0e481898575053069d94183
+
+# Bump ormolu version and reformat.
+# CommitDate: Thu Nov 11 09:38:59 2021 +0100
+e52bd7226ebe0f5b0a8adb7e54e86969177fff90
+
+# Apply `ormolu` to all Haskell files to ensure consistent formatting.
+# CommitDate: Thu Jul 15 23:41:34 2021 +0300
+db951c118c4658bd92580736c8b96c9f4a70aeb4
+
+# New ormolu version changes format slightly
+# CommitDate: Mon Jun 22 11:55:11 2020 +0200
+ccf6d0efaff1a37218948040f42be92fa5bd4ed5
+
+# Format with ormolu
+# CommitDate: Tue May 12 10:44:32 2020 +0200
+5e87a0fd32d5bdb2e82d90c5a76617ec46162404
+
+# Add brittany check to CI
+# CommitDate: Fri Nov 9 10:07:35 2018 -0400
+65dff911cea8103edf3e09bb779c0cf9d1561262