forgejo/workflows: add pre-commit based linting

.forgejo/pre-commit/config.yaml

@@ -0,0 +1,23 @@
+exclude: ^tests/ref/
+
+repos:
+- repo: https://github.com/pre-commit/pre-commit-hooks
+  rev: v5.0.0
+  hooks:
+    - id: check-case-conflict
+    - id: check-executables-have-shebangs
+    - id: check-illegal-windows-names
+    - id: check-shebang-scripts-are-executable
+    - id: check-yaml
+    - id: end-of-file-fixer
+    - id: fix-byte-order-marker
+    - id: mixed-line-ending
+    - id: trailing-whitespace
+- repo: https://github.com/codespell-project/codespell
+  rev: v2.4.1
+  hooks:
+    - id: codespell
+      args:
+        - --ignore-words=.forgejo/pre-commit/ignored-words.txt
+        - --ignore-multiline-regex=codespell:off.*?(codespell:on|\Z)
+      exclude: ^tools/(patcheck|clean-diff)$

.forgejo/pre-commit/ignored-words.txt

@@ -0,0 +1,118 @@
+abl
+acount
+ACN
+addin
+alis
+alls
+als
+ALOG
+ALS
+anull
+ANC
+ans
+ANS
+basf
+bloc
+brane
+BREIF
+bu
+BU
+bufer
+caf
+CAF
+clen
+clens
+Collet
+compre
+dum
+endin
+erro
+fiel
+FIEL
+fils
+filp
+filterd
+FILTERD
+fle
+fo
+FPR
+fro
+Hald
+ine
+inh
+inouts
+indx
+inout
+inport
+ist
+laf
+LAF
+lastr
+LinS
+mapp
+mis
+mot
+nd
+nIn
+offsetp
+orderd
+ot
+outout
+padd
+paeth
+PAETH
+parm
+PARM
+parms
+pEvents
+PixelX
+Psot
+quater
+readd
+reencode
+Reencode
+recuse
+redY
+remaind
+renderD
+rin
+SAV
+SEH
+ser
+SER
+setts
+shft
+siz
+SIZ
+skipd
+sme
+som
+sover
+STAP
+startd
+statics
+struc
+suble
+te
+TE
+tha
+tne
+tolen
+tpye
+tre
+truns
+trun
+TRUN
+Tung
+tE
+TYE
+ue
+ues
+UES
+vai
+vas
+vor
+vie
+VILL
+wel
+wih

.forgejo/workflows/lint.yml

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+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  lint:
+    runs-on: utilities
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install pre-commit CI
+        id: install
+        run: |
+            python3 -m venv ~/pre-commit
+            ~/pre-commit/bin/pip install --upgrade pip setuptools
+            ~/pre-commit/bin/pip install pre-commit
+            echo "envhash=$({ python3 --version && cat .forgejo/pre-commit/config.yaml; } | sha256sum | cut -d' ' -f1)" >> $FORGEJO_OUTPUT
+      - name: Cache
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/pre-commit
+          key: pre-commit-${{ steps.install.outputs.envhash }}
+      - name: Run pre-commit CI
+        run: ~/pre-commit/bin/pre-commit run -c .forgejo/pre-commit/config.yaml --show-diff-on-failure --color=always --all-files