chore: update flint to 0.21.0 (#2045)

Updates the flint binary pin to v0.20.4 and reruns `flint init -y` so
the generated lint workflow and linter config match the current release.

Validation:
- `flint init -y`
- `flint init -y` again for idempotence
- `git diff --check`

---------

Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

Author: zeitlinger

.editorconfig

@@ -7,7 +7,7 @@ indent_size = 2
 [{version-rules.xml,maven-wrapper.properties,checkstyle.xml,docker-compose.yaml,docker-compose.yml,Dockerfile,example_target_info.json,mise.toml,mvnm,mvnw.cmd,generate-protobuf.sh,.gitleaksignore,prometheus.properties}]
 max_line_length = 200
 
-[{grafana-dashboard-*.json,.editorconfig,super-linter.env,lychee.toml,renovate.json5,CODE_OF_CONDUCT.md}]
+[{grafana-dashboard-*.json,.editorconfig,lychee.toml,renovate.json5,CODE_OF_CONDUCT.md}]
 max_line_length = 300
 
 [pom.xml]
@@ -20,3 +20,11 @@ max_line_length = 120
 
 [{.mise/tasks/build-release.sh,.github/workflows/*.yml}]
 max_line_length = 300
+
+[*.java]
+# Java line length is handled by google-java-format
+max_line_length = off
+
+[*.md]
+# Markdown line length is handled by rumdl
+max_line_length = off

.github/config/.editorconfig-checker.json

@@ -0,0 +1,5 @@
+[MD013]
+enabled = true
+line-length = 120
+code-blocks = false
+tables = false

.github/config/.rumdl.toml

@@ -0,0 +1,3 @@
+[formatting]
+column_width = 120
+indent_string = "  "

.github/config/.taplo.toml

@@ -0,0 +1,8 @@
+extends: relaxed
+
+rules:
+  document-start: disable
+  # Line length is owned by the repo's root .editorconfig.
+  line-length: disable
+  # Keep indentation checks in yamllint so YAML structure issues still fail lint.
+  indentation: enable

.github/config/.yamllint.yml

@@ -1,14 +1,7 @@
 [settings]
 # These paths are generated, vendored, or handled by other checks.
-exclude = [
-    "CHANGELOG.md",
-    "**/src/main/generated/**",
-    "docs/themes/**",
-    "mvnw",
-    "simpleclient-archive/**",
-]
+exclude = ["CHANGELOG.md", "**/src/main/generated/**", "docs/themes/**", "mvnw", "simpleclient-archive/**"]
+setup_migration_version = 2
 
 [checks.renovate-deps]
-# This inventory is regenerated from the files flint still inspects, so
-# super-linter-era entries drop out when they are excluded or no longer used.
 exclude_managers = ["github-actions", "github-runners", "maven"]

.github/config/flint.toml

@@ -67,24 +67,25 @@
   "mise.toml": {
     "mise": [
       "actionlint",
-      "cargo:xmloxide",
+      "aqua:owenlamont/ryl",
+      "biome",
       "editorconfig-checker",
       "github:google/google-java-format",
       "github:grafana/flint",
+      "github:jonwiggins/xmloxide",
+      "github:koalaman/shellcheck",
       "go:github.com/gohugoio/hugo",
       "go:github.com/grafana/oats",
       "java",
       "lychee",
       "node",
-      "npm:@biomejs/biome",
-      "npm:markdownlint-cli2",
-      "npm:prettier",
       "npm:renovate",
       "pipx:codespell",
-      "pipx:ruff",
       "protoc",
-      "shellcheck",
-      "shfmt"
+      "ruff",
+      "rumdl",
+      "shfmt",
+      "taplo"
     ]
   },
   "mvnw": {

.github/config/super-linter.env

@@ -1,6 +1,6 @@
 {
   $schema: "https://docs.renovatebot.com/renovate-schema.json",
-  extends: ["config:best-practices", "config:recommended", "github>grafana/flint#v0.20.3"],
+  extends: ["config:best-practices", "config:recommended", "github>grafana/flint#v0.21.0"],
   platformCommit: "enabled",
   automerge: true,
   ignorePaths: [

.github/renovate-tracked-deps.json

@@ -29,6 +29,8 @@ jobs:
       - name: Lint
         env:
           GITHUB_TOKEN: ${{ github.token }}
-          GITHUB_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
+          GITHUB_REPOSITORY: ${{ github.repository }}
+          GITHUB_BASE_REF: ${{ github.base_ref }}
+          GITHUB_HEAD_REF: ${{ github.head_ref }}
           PR_HEAD_REPO: ${{ github.event.pull_request.head.repo.full_name }}
         run: mise run lint