chore: migrate from super-linter to flint v2

Replace super-linter, lint:links, and lint:renovate-deps with a single
flint run invocation. Add google-java-format and standard lint tools
(shellcheck, shfmt, prettier, markdownlint-cli2, actionlint,
editorconfig-checker, codespell, ruff) to mise.toml.

flint.toml excludes docs/themes/ (Hugo theme), src/main/generated/
(generated code), and mvnw (generated Maven wrapper with known
shellcheck issues). renovate-deps exclude_managers migrated from the
former RENOVATE_TRACKED_DEPS_EXCLUDE env var.
Signed-off-by: Gregor Zeitlinger <gregor.zeitlinger@grafana.com>

Author: zeitlinger

.github/config/flint.toml

@@ -0,0 +1,9 @@
+[settings]
+exclude_paths = [
+    "docs/themes/",
+    "src/main/generated/",
+    "mvnw",
+]
+
+[checks.renovate-deps]
+exclude_managers = ["github-actions", "github-runners"]

mise.toml

@@ -1,16 +1,24 @@
 [tools]
+"cargo:https://github.com/grafana/flint" = "branch:feat/flint-v2"
 "go:github.com/gohugoio/hugo" = "v0.157.0"
 "go:github.com/grafana/oats" = "0.6.1"
+"ubi:google/google-java-format" = "1.26.0"
+actionlint = "1.7.10"
+editorconfig-checker = "v3.6.1"
 java = "temurin-25.0.2+10.0.LTS"
 lychee = "0.23.0"
 node = "24.14.0"
+"npm:markdownlint-cli2" = "0.17.2"
+"npm:prettier" = "3.8.1"
 "npm:renovate" = "43.45.1"
+"pipx:codespell" = "2.4.1"
+"pipx:ruff" = "0.15.0"
 protoc = "34.0"
+shellcheck = "v0.11.0"
+shfmt = "v3.12.0"
 
 [env]
-RENOVATE_TRACKED_DEPS_EXCLUDE="github-actions,github-runners"
-# renovate: datasource=docker depName=ghcr.io/super-linter/super-linter
-SUPER_LINTER_VERSION="slim-v8.5.0@sha256:857dcc3f0bf5dd065fdeed1ace63394bb2004238a5ef02910ea23d9bcd8fd2b8"
+FLINT_CONFIG_DIR = ".github/config"
 
 [tasks.ci]
 description = "CI Build"
@@ -49,26 +57,22 @@ run = "./mvnw verify"
 description = "build all modules without tests"
 run = "./mvnw install -DskipTests -Dcoverage.skip=true"
 
-# Shared lint tasks from flint (https://github.com/grafana/flint)
-[tasks."lint:super-linter"]
-description = "Run Super-Linter on the repository"
-file = "https://raw.githubusercontent.com/grafana/flint/0ac131d7832bd8964f6ca9e5af73207dca6a85ba/tasks/lint/super-linter.sh" # v0.7.1
-
-[tasks."lint:links"]
-description = "Lint links"
-file = "https://raw.githubusercontent.com/grafana/flint/0ac131d7832bd8964f6ca9e5af73207dca6a85ba/tasks/lint/links.sh" # v0.7.1
-
-[tasks."lint:renovate-deps"]
-description = "Verify renovate-tracked-deps.json is up to date"
-file = "https://raw.githubusercontent.com/grafana/flint/0ac131d7832bd8964f6ca9e5af73207dca6a85ba/tasks/lint/renovate-deps.py" # v0.7.1
-
 [tasks."lint"]
 description = "Run all lints"
-depends = ["lint:super-linter", "lint:links", "lint:bom", "lint:example-poms", "lint:renovate-deps"]
+depends = ["lint:bom", "lint:example-poms"]
+run = "flint run"
+
+[tasks."lint:fix"]
+description = "Auto-fix lint issues"
+run = "flint run --fix"
+
+[tasks."lint:pre-commit"]
+description = "Fast auto-fix lint pass — intended for pre-commit/pre-push hooks"
+run = "flint run --fix --fast-only"
 
 [tasks.fix]
 description = "Auto-fix lint issues"
-run = "AUTOFIX=true mise run lint"
+run = "flint run --fix"
 
 [tasks.acceptance-test]
 description = "Run OATs acceptance tests"